Welcome Matt. I'm Brady. Glad that you signed up with Susan's!
I'm an FTM as well. You said that you were a lurker, so you probably read that I am gay. BUT I know what you are going through though!
As for your mom, give her plenty of information and time. As someone on here once told me, let her ask all the questions she needs to. She will accept it better if she understands it better. Let her know that it's not her "fault" and treat the subject lightly for a little while. I know how hard it is dealing with parents who are unaware of transexualism. I am wanting to cut my hair into a fauxhawk but my dad (who thinks all women should be the most feminine they can be) would ridicule me for it. But, all I can say is be brave. Plus, now that you are on Susan's, you have a family that you can always depend on. I've come to know that over the past few months. Try as hard as you can to work it out with your mom. Maybe even see a family counselor. If you can't work it out, then deal with it in the best way that you think is possible. Hopefully she will come around.
As for anti-depressant pills, are you over 18? If you are, really, there is nothing she could do about it. If not, then talk to her about a psychiatrist that you could see, that she approves of. Then, if the psychiatrist prescribed the drugs, your mom would know that you really do need them.
I think all transexuals at one point in their lives have had a feeling like "There is no way out, I am trapped in this body and that's it." Wrong. There is a way out. Until you can start HRT and surgery, there are alternatives. My family has no idea I am transgendered. But, I just ordered a binder and I have several articles of men's clothing. I even bought a man's watch yesterday. What I am getting at is, even though it's not changing my body physically, doing little things like purchasing binders or men's clothing helps me cope. I know that I am doing all that I can at the moment and that things will get better. Even though it seems like a long time away, be patient. It will work out for you. Whatever you do, don't hurt yourself in any way. That will only cause more physical and emotional stress on yourself.
Well Matt, I'm glad you have come to Susan's. Not only can you get great advice here, but you have so many people who care about you. If you ever need to talk PM (personal message) me anytime. I will try to help in every way possible. Glad to know ya, Matt. Take care.
-Brady-