Yes, I believe it will get better, in fact very much better. Personal experience suggests improvement usually happens either during an "A-ha" moment of insight & inspiration/transformation or thru a more gradual growth process. It sounds like your mother is making progress in that she both complimented you and offered tips on your make-up and tweezing. She helped touch up your back to make it stubble-free. That all sounds pretty loving and accepting.
She is also being honest with you (and herself) when she verbalized "I can't handle this" and "It's going too fast." She is clearly stating needs. That doesn't mean you compromise either your values or your self/self-identity, but this is a situation that calls for warm feelings of compassion on all sides. I know for myself that responding with feelings of compassion towards someone whose behavior has been controlling is a lot to ask, and yet I think this may be exactly what your current situation calls for.
Unless your mother happens to have another family member who is Trans (e.g. her brother, her aunt, etc) to help her understand this, to help empathize with what all she is going thru--e.g. she is losing her image, her idea of who you are, in this case, I believe a son and is in the process of learning about who you are as her daughter. Perhaps I have bits of this mixed up, but in any event she may well be grieving a legitimate loss as part and parcel of accepting who you are now, rather than who she thought you were for N number of years.
Advice to you & mom:
Do check out your local chapter of Parents, Families and Friends of Lesbians & Gays. Here's a link to the Tacoma, WA chapter webpage:
http://www.pflagtacoma.org/ as well as to what I found on PFLAG's national site for Trans:
https://community.pflag.org/transgenderDigression before I offer more advice: One of my old friends from when I was in high school (or nearly 40 years ago) came out to me as a Trans-man (female transitioning to male) about 15 years ago. Even as a gay man, it still took me some time to wrap my brain around the idea that my good friend Adrienne was now Adrian (tho nowadays he goes by Robert.) Less than a year ago another good friend, in this case a young Gen X gamer came out as Trans and explained very nicely and lovingly that it made sense to him that I might have a bit of difficulty in updating my mental images and understanding since as Donna he'd presented himself (very successfully) as female. The point here is that your mother has all this history of how she has thought of you, from being a three or four year old learning to ride a tricycle to first day of school, etc. and all of those memories with another gender attached. She may well be grieving the death (of the idea) of her little boy and teenage son, and she may need to process that before she is able to accept and celebrate her daughter. I think it might be okay to ask her about this, empathizing that this transition may not be easy for her, even as perhaps it may be effortless for you.
Here are some links I found that might be helpful:
Jazz Jennings And Her Mom Offer Wonderful Advice To Parents Raising Transgender Kids
http://www.buzzfeed.com/skarlan/i-am-jazz#.bupJ3ebdGgThis is advice from a transwoman and parent
https://sillyolme.wordpress.com/advice-to-parents-of-transkids/Advice for America from Parents Who Support Their Transgender Kids
http://www.buzzfeed.com/dominicholden/advice-for-americans-from-parents-who-support-their-transgen#.kuBlxM9BEPHere is a link from genderspectrum.org:
https://www.genderspectrum.org/explore-topics/parenting-and-family/Advice for transgender teens (with some advice also for parents):
http://www.gay-therapy-ct.com/advice-for-transgender-teens.htmlHere's a link to a large number of articles:
http://www.huffingtonpost.com/news/parents-of-transgender-children/And this one also looks decent:
http://kidshealth.org/parent/positive/talk/transgender.htmlI think you may be beyond what the articles I found here speak to; however, they also include some resource links and hence might be worth checking out:
http://www.advocatesforyouth.org/publications/publications-a-z/731-i-think-i-might-be-transgender-now-what-do-i-doThis is one I thought your mom might like, but I'd like to recommend you review it first both for content and because you know better than I can guess what your mother might be able to benefit from reading:
http://kidshealth.org/parent/positive/talk/transgender.htmlAlso, I found a web site that I think you might enjoy; Laura's Playground looks to be devoted to MtF and contains a cornucopia of links to articles, other websites, MTF chatroom etc.
http://www.lauras-playground.com/mtf.htmRe: happiness. Yes, it almost certainly gets better for you and for your mother. Take the time to read and educate yourself (you and she) and then take the time to put your new understanding(s) into practice.
Wishing you and your mother Patience, Wisdom, and Love,
j.r.