I started taking generic Bactrim about 3 weeks ago for an ear inf...

I started taking generic Bactrim about 3 weeks ago for an ear infection. The first two weeks I had no problems, the third week I woke up one morning with one side of my neck sore. I thought I just slept on it wrong and didn't think it could be associated with Bactrim then over the next two days my neck became more stiff and sore it even hurt to touch. I could not move my neck at all without experiencing pain. Also I would get servere headaches when I moved my eyes to look up or to the sides. The sharp headaches would only last about a minute or so after moving my eyes. My arms and legs started to feel achy like when I have a fever. The third day after the first sign of neck pain I broke out in hives on my arms and hands. I stopped taking the Bactrim (because I found this site and similar ones) and two days later most of my hives were gone and my neck pain was noticeably less. Four days off of Bactrim and my neck is almost completely better and my hives gone. I will never take a sulfa drug again