Bactrim Nausea and Vomiting, Slow Heart, Legs and Feet, Cant Sleep, Experence

i started on bactrim 3 days ago to treat a strep throat, within a couple of hours of taking the 1st tablet i had nausea, and vomiting and diarrhea, 12 hours later i took my 2nd tablet, soon after i noticed i had a slow heart beat, paputations, tingling in my right foot, and that night i went to bed and was so itchy i nearly scratched my skin off, i decided not to take any more bactrim, yesterday and still today i am experiencing heart paputations , tingling in both legs and feet, either very slow or very fast heart rate, hense why i cant sleep and am up at 5am, needless to say i am hoping these symptoms dissapear soon as i have been off bactrim for 48 hours now, this medicine is ridiculous, i am also allergic to penicillan, erthromicin and keflex but my experience with those allergies was just a rash not all of these, i believe this medicine is very dangerous, and would never take it again and certainly not if penicillan is an alternative.