It is your life, health, and responsibility. If something isn't working/is "harming" you, I wouldn't take it. I would maybe call his office, since your appointment is so far in the future, and try to talk to him or a nurse and let them know what you have done. They may want you to come in sooner or have some other insight. When you do see your doctor, discuss it with him and ask what to do in the future if a med seems to be causing a problem? The two of you should have backup plans.