Sulfamethoxazole and pimples

If I had gone online first I never would of taken this medication. I too needed to be treated for UTI and was given this. I became constipated for 2 1/2 days and on the 3rd day at night I started to itch uncontrollably. Next day, I am covered in hives/rash all over the body. All red little pimples and parts of my body/face burn. It seems it is all over the internet but the pharmacist gave it to me casually anyways.

Shaking....
I have had severe shaking as a side effect to this drug, given to me for UTI. My head and entire body shakes! I get dizzy as well. The shaking is not listed anywhere on the side effects list either. But, I found it here on this site. I haven't taken the dose this morning and still am shaking... apparently I have the med built up in my system...
Also I just feel generally horrible and I didn't before... I have this strange discharge (which is listed as a side effect and to stop taking it)... my stomach is sick... and I don't know why anyone would take this medication!!!!