Anxiety pills?

Does anyone knows the basic about anxiety pills? I have horrible anxiety and I'm considering going on a pill? I'm almost 15 years old and I can barely handle going to school I'm so terrified, also when I go into classes it just turns a switch and I pretty much have a small panic attack each period. Also how do I convince my mom if I do want to go on them? She said it has a ton of side effects and that I might get depression while on them and I might have to pay for them since there "super" expensive. I prob can't get them for awhile because of the price. Thanks!!   Also I know I might have to talk to a phycologist