Spider bites symptoms and conditions

I had spider bites that got infected. I was given Sulfamethoxazole (double strength) two tablets, two times a day. I was getting symptoms like dizziness, disorientation, and leg weakness so I lowered my dosage as a precaution then...boom, I was sent into a seizure. I am very scared of the nerve damage that has been done.

Well since we are taking snake venom, here are the symptoms for a snake bite:
* bloody wound discharge
* fang marks in the skin and swelling at the site of the bite
* severe localized pain
* diarrhea
* burning
* convulsions
* fainting
* dizziness
* weakness
* blurred vision
* excessive sweating
* fever
* increased thirst
* loss of muscle coordination
* nausea and vomiting
* numbness and tingling
* rapid pulse

UNTIL READING DIFFERENT REACTIONS TO BACTRIM, I THOUGHT THAT I MAY POSSIBLY HAVE A BRAIN TUMOR. I STARTED BACTRIM FOR POSSIBLE STAPH INFECTION AFTER HAVING POISON IVY AND SOME SPIDER BITES. AFTER TWO DAYS ON BACTRIM, I DEVELOPED A LOW FEVER AND HAD DIFFICULTY SLEEPING ALSO HEADACHE. I STOPPED TAKING IT ABOUT HALFWAY THROUGH MY PRESCRIPTION AND DEVELOPED DOUBLE VISION FOR THE NEXT SIX DAYS OFF AND ON. THE WORST TWO DAYS FOR ABOUT FOUR HOURS STRAIGHT. I SAW A OPHTHALMOLOGIST WHO COULD FIND NOTHING WRONG WITH MY EYES AND SUGGESTED THAT MANY THINGS COULD CAUSE IT FROM MEDS TO A BRAIN TUMOR. I FEEL BETTER AFTER READING OTHER ADVERSE REACTIONS. I ALSO DEVELOPED HIVES ON BOTH THIGHS. NASTY MED.

Severe headaches and earaches, chest pain when I exhale to deeply. Sores on my legs that look like spider bites and are swollen sensitive to touch.