I am a 47-year old male; I was prescribed Bactrim for MRSA; after...

I am a 47-year old male; I was prescribed Bactrim for MRSA; after taking the prescription for just two days; My head felt as if it would explode (later told by doctor I had hives on the "inside of me"; I felt like I could not get my breath; my heart was racing; I broke out in hives - large red itchy splotches all over my body; pain in my abdomen; the inside of my mouth felt burnt and sore; eventually my lips felt burnt and began to blister and erupt; my penis glans began to blister and erupt; I thought I was dying of some sort of flesh-eating disease. 4-days after my last taken dose and I still am having these side effects.