51 yr old female. I had a painful stomach and lower back pain attack lasted about 1/2 hour went down right side and groin and leg. Severe pain and diarrhea. Nausea. not directly after eating. 2 days later same but across whole torso and down my spine/back felt like back labor. Lasted about 1/2 hour. After eating Nausea Last few days empty stomach aches until i eat. Do take a probiotic. Just started thyroid medication. Could this be lactose intolerance or a probiotic issue.