I have been on Paxil for 2 years and it worked great, however just recently my anxiety has returned, brain zaps, heat intolerance, and so forth and I have never missed a dose! It is like I am having withdrawal symptoms when I'm not withdrawing anything! Has this happened to anybody and what do you do? I am desperate! My doctor upped the dosage as I am on 25MG extended release to 35MG and it made me feel so bad! I was in a fog for most of the day, maybe Paxil is not good for me anymore, does this happen?