Multiple health issues within 5-6 days.

5 days ago , I experienced pain under left shoulder bone area in the back adjacent to spinal cord while turning myself  right or left. I thought it was a muscle spasm and brought medicine from chemist, which worked and within 3 days it was gone. Alongwith the pain was indigestion due to which I had developed constipation alongwith foul smelling gas and acidic but very less dark yellow  stool for 2 days . On the 4th day I had stool which was normal, but undigested yellowish stool. But there was little pain adjacent to the last left rib bone. The gas hadn't passed completely though. Today since 1 o clock in the morning I am having running stools for almost 6 times, in midst of which fearing diarrhoea, I ate norflox and gelusil. Yellow stool with undigested food occurred. Now after having breakfast (sago) alongwith omez-d I am feeling some relief. But don't know what's happening with my body or will this persist again . Kindly help