Stomach discomfort. From acidity or gas.

I had constipation, and was not regular, stool was not in regular shape and even not regular. Pura pass hi ni hota tha dalia type. Then i tried with homeopathy that didnt work much and simultaneously took isabgol. Isbgoal was good and i started to feel hunger which i lost a little, earlier. I also did two days autophagy that was also superb which helped healing stomach pain. Homeopathy doc suggested i have irritation and discomfort. And asked not to consume spicy food or oily food which i also don't use much, two or three times in a month. But that is true that i feel discomfort when i consume spicy food. Main issue is i feel mild pain when i pinch with three fingers in both right and left sides of stomach, It seems i have stomach ulcer but not sure it is. Do i need to go for endoscopy or colonoscopy. Means i am not sure whether i have give birth to large or small intestine cancer. I am confused a bit what should i do. One thing to tell you I am not suffering From acidity or gas.