I want to sue my Psychiatrist but do I have a case?

I began seeing a psychiatrist last year around this time. My weight was very low (110 5'5") but by October I was up to around 124 and I was ok with that weight. I have had weight issues before and did not want to gain anymore. My doctor, knowing my issues with weight, started me on a medicine around the end of October. Between then and March my weight had ballooned up to 160 pounds. He never told me the side effect of the medicine because I would not have taken it if I knew the side effects. Now I have social anxiety, I don't go out in public and rarely (very rarely) see my friends because I don't want anyone to see me this way. I used to love my body but now it makes me cry at night. Do I have grounds to sue for emotional damage or punitive damages? (I don't know what punitive damages are) I just wanna someone to say that it sounds like I have a case so I can set up the first consultation with a lawyer. Thanks for any help provided.