my daughter had a uti and they put her on Bactrim . After finishing the antibiotic she woke up with swollen glands and her eyes hurt. Went back to doctor and said it was a virus. Next day woke up with itchy rash over trunk area so figured it was part of the virus and didn t sleep all night due to constant itching. Tried aveeno bath, hydrocortisone cream, aloe , nothing worked. Next day rash all over face and neck and then face started to swell. Went to immediate care and diagnosed with allergy to Sulfa. Gave here 5 days of steroids, hydrocortisone tablets and cream. Also Pepcid . Has one day left of steroid and is experiencing squeezing feeling upper abdomen and under her ribcage. Now what could this be?