I Recently Have Had A Sensitive Digestion After Taking Antibiotic.

I recently have had a sensitive digestion after taking antibiotic. Since I'm continued probiotic. However food has been making me feel nauseous. Tonight I had a protein bar snack and then became so sick that I felt like I could vomit. My stomach burns, and I removed a lot of waste but not diarrhea. My stomach burns. upper abdomin in the middle.