Hi, I Was Given Sulfamethoxazole=-tmp - Take Two Tablets, Twice

hi, I was given sulfamethoxazole=-tmp - take two tablets, twice a day. Doesn't say dosage. I had a tummy tuck and I was allergic to the stiches, tummy tuck was last November and we just went in to take out the stitch after attempting to let it heal. While they were in there, they did a culture of the skin inside of me and it came back with positive and I was put on this medication. Does this medication mess with one's mind. I feel like I am going crazy, emotional, etc.