I'm sorry you feel you aren't able to work with the adults trying to help you. If you have a real problem with the medicine, the most adult thing to do is to call the "quack" doctor and tell him/her your fears and have a discussion. Why didn't you discuss medicines with him in the first place? I'm sure that the doctor gave you meds because you need them, and they can help you feel better and not like everything in life is garbage.

Part of being a child is allowing adults to make decisions for you. You are more likely to get into worse feelings by not doing anything, then by trying a good medicine known to help depressive feelings. Please reconsider. I'm sure that now you know some of the possible reactions, you will alert your mom to them if they happen.