I was prescribed this for a UTI. Dosing was one pill twice a day...

I was prescribed this for a UTI. Dosing was one pill twice a day for 3 days. I took one dose of this medication & the side effects were awful. I am not allergic to anything & was shocked that I had a reaction to Bactrim. I took my first dose at 1pm and actually started to feel pretty decent (better than I had in days) but by 7pm the side effects started. I had pins & needles feelings all over my body that are still present (almost 48 hours after taking med) side pain, joint pain, rash, fatigue. No headache thank goodness! I didn't stay on this medication because to be honest the side effects and all of the things I am reading on the internet have scared me. My UTI appears to be better - however after just one pill - Im certain its not cleared up.