I Want to Become a Vegetarian

Lately my colon and digestive system has been really messed up I don't even want to eat anything anymore.. So I'm thinking about becoming a vegetarian though I rarely eat meat, I eat chicken and fish cuz meat is bad for me anyways due to my health problems and I don't like it so I don't mind not eating it. Actually right now I don't mind not eating at all but that's not possible, I'm so tired of the constipation and all the shit that's been happening to my digestive system.