Sulfamethoxazole and ankles

Nothing short of nightmarish. 10 minutes after I took a pill, I experienced extreme itchiness which escalated to a sense of being eaten alive by red fiery ants. Every nerve in my body seemed to be pricked with painful needles, my scalp, inside my ears, torso and worse in hands, ankles and feet.No visible rash appeared but my temperature dropped to 97, my throat felt tight and after 10 hours, while much better from benadryl, predinsone and countless warm showers, I am still feeling the ants and needles and an acute sense of anxiety.

I began taking sulfameth about 1 week ago. Everything seemed ok until one morning I woke up and my neck was completely stiff! I started getting the hot and cold feeling and a splitting headache with nausea. I took tylenol and it seemed to improve a little. That evening I woke up every ten mins, just unable to get quality sleep. Next morning I woke up (after no sleep again), COVERED in hives. I mean, from my head to my ankles, these huge, red, itchy things all over! My throat, too. You know how it feels right when you swallow?..that's how my throat felt constantly. I was completely freaked out as hubby was at work and I was home alone with my 4 kids. So we hauled booty to the clinic and sure enough, allergic reaction to the antibiotic. I'm actually allergic to penicillin as well, so the doctor I saw said she was really surprised my other doctor would have prescribed a sulfer drug to me as it has a high instance of causing allergic reactions. hhhmmm...thanks.
Anyway she said I could take benadaryl, but better yet, Claritin. She said Claritin won't make you drowsy and will knock it right out (you should take benadryl instead of claritin if you're breastfeeding though). That was yesterday, and besides some weird mottled look on my legs (leftover rash), all seems well.

I was put on sulfameth for two weeks due to my acne; one pill twice a day. Yesterday, my 13th day, I woke up with sore joints. I didn't think anything about it, though I'd had a soreness in my joints for a while now, because I work out a lot. This morning though, I woke up with all my joints SCREAMING! Ankles, knees (especially), wrists, elbows, and neck. My knees, elbows, and wrists were the worst though. It eventually fades as the day progresses, but never goes completely away.

Taken for UTI. 26 years old, Asian, 5'2'', 120 pounds.
After 7 days of taking a 10 day RX. on the 8th morning I forgot to take it but got an undecent trade off with an body rash as follows:

1st day: rash with no itch on the torso. progressive during the day to my knees and neck with minor itch. sleepless night
2nd day: head to toes rash (red spots not clumped but individual in various sizes within half an inch). ankles and knees stiff. warm face with no fever.

I am a 5'2'' tall asian 26 years old who had suspicions of an UTI and was givin this RX. After 7 days (on the 8th day OF a 10 day RX) I forgot to take the morning pill but broke out in a rash all over my body from neck to my knees. At first I thought it was a sun rash but it was even in areas where the sun didn't shine. After an hour I broke out to my ankles and on my face. After two hours began to itch and went to urgent care where they think I was allergic. I took another urine sample and still had irritation in the bladder.

so far ive had a rash on my legs, ankles, stomach, and alittle on my arms for a few days, little nausea