Wow that sucks. It's so depressing to hear that your mom is unwilling to let you pursue your cross-dressing to the point that she will empty your stash without thinking to ask or tell you, or just let you keep it. I mean, what harm is it doing to her?
I would frankly be pissed off if I was in your shoes and would have probably thrown a mega hissy fit in the process. It seems like you handled it as well as you could though. I'm sorry to hear about the unwilling purge. I hope you can recover from it and maybe recliam your goods before they make it to the dumpster or wherever.
I would agree with the rest of the girls here though - talk to her. She has to throw aside her ignorance in favor of your happiness. If she loves you she should do that much.
I really hope that all this works out well for you. Take care!
Oh, and to the general assembly out there: I can't belive how most of you have had to live in secrecy like this about your cross-dressing. My parents never rifled through my stuff (that I know of) or confiscated anything related to my cross-dressing. When I was 16 I had a closet full of dresses and other less savory items and no one said 'boo.' I'm sorry to all of you who have to keep this part of yourselves a secret from your loved ones; it's just not fair.