Irregular bowels. For couple of days!

This started after eating outside food. Others with me also had upset stomach, but for me it started after a couple of days, and not recovered after 40 days. Week1. Stool in 2-3 hours of eating, has undigested food, slightly dark & foamy. On suggestion of a friend (radiologist) took omeprazole, which worked, but anything other than curd rice or stopping medicine, brought back symptoms. Week 2. He doubted h.pylori and asked me to take lansoprazole 30mg, clarithromycin 250mg, and amoxycillin 500mg for a week. Reduced symptoms a lot, and stool is regular (1/day). But, having very loose & watery stool, dark in color and undigested material Week 3. Gasteroenterolgist here on practo suggested to stop all h pylori medicine, take tab satrogylO 1 tab twice daily after food for 3 days. No loose stools. Otherwise, no impact Currently, no medicines, stool is twice a day, has undigested food, mucous, slightly foamy & dark. Spicy food makes stool loose & more frequent for couple of days