Gastric Pain Severe following Amoxicillin

Patient: I was rx’d Amoxicillin 500mgs and Ibuprofen 800mgs Monday following dental extraction of two impacted wisdom teeth. I took 3 full courses of Amox prior to the procedure with no problems. I have taken 3 courses of Amox in 3 months.

Symptoms: I woke at 1am with severe gastric pain. Abdominal. No vomiting. No rash. No bleeding. I d/c’d both meds. I am still experiencing severe gastric cramping and pain. I’m a nurse and wonder if I need labs drawn. I may have an allergic reaction. It is possible I contracted a stomach flu. ?