A stomach issue

15m. So a week ago I bought a shawarma and I ate it with gluttony. I got a stomach issue , I had dihareea for 2 or 3 days and then I had solid stools , I took some Imodium pills , but when I eat too much or normally I get a need to use the toilet. I still have this issue, I am taking Imodium and eating gentle food (Stew, rice , toast sandwiches with bread). What should I do? Should I take OTC pills or visit the doctor?