I have obsessive-compulsive disorder, and I was recently prescribed Bupropion (Welbutrin) to treat it. There have been numerous symptoms for the past week, such as nausea, headaches, mild fatigue, etc. Two days ago, I the top/left part of my head on the corner of an open cabinet. 

I still had the mild headache, but it mostly cleared up by now. However, the slight nausea still persists, and I feel mildly fatigued and brain foggy almost? The spot where I hit my head is no longer sore, but now I am very anxious about having a concussion. I checked my pupils and they seem slightly different sizes from eachother, but I'm not sure.

This is really eating up all my thoughts, and I can't really verify if the symptoms are concussion or medication related. What should I do? If I do have a concussion from hitting my head (and note, it wasn't particularly hard), will that result in permanent damage/intelligence loss or anything like that?