Abdomen pulsation. Can't go to outside?

I don't know what the cause is,but I'm been experiencing strange abdomen pulsation just like heart-beat.I want to correct the fact,that I am not a lean person,rather my weight last recorded time was about 70-74kg.My body size is normal i.e sleek sized hands,arms,legs except my stomach or belly is a little fat(not excess fat like those obesity ones),where I think I had enough fat or cholesterol content on my two waists.I would like to say one thing,that I used to eat a lot...lot of spicy and fast food 3-4 months ago.Is it the cause of these spicy foods?Along with that,I'm feeling like my chest is beating something like irregularly.Now,my body muscle mass are loosening.Please doctors,advice me something like medications or tips,as there were lockdowns so I can't go to outside?