Burning when peeing. aching in groin. no appetite and very fatigued. just finished a course of penicillin for seven days from strep. ?

UTI/STD: Get checked ASAP: It sounds like a urinary infection, probably not sensitive to penicillin. If having unprotected sexual intercourse, get an STD profile.

Dysuria: Burning with urination can be a symptom of a urinary tract infection. Since penicillin doesn't always cover all of the possible bacteria in the urine, a urinalysis with culture should be performed. Notify your doctor right away if you notice blood in your urine, because this could be related to your recent Strep infection in the form of glomerulonephritis.