Bactrim is a probiotic, will need couple of days to act.
Once you recover, please see your physician again if you continue same symptoms, and Ultrasonography of abdomen and colonoscopy might help ...
Hello,
To me should see endocrinologist to re-evaluate your thyroid status with ultrasound and blood tests.
Meanwhile, start taking vitamins to boost immune system.
All the best. Let me know if you have any other concern. ...