Help:(

So this is very tmi I'm sorry but for the past couple days I've been having... diarrhea and I don't know why, and Everytime it happens I get shaky and feel nauseous and I think it's bc I have very bad anxiety and Everytime something is physically wrong with me and get very panicked. But it's gotten to the point *TMI TMI TMI* where my actual butthole kinda hurts and burns?? It almost feel like there's little scrapes inside of it so now it hurts whenever I use the restroom. I just don't know what to do because after I eat anything I have to run to the bathroom :(( does it sound like something to be concerned about? Also does anyone have any tips on how to feel better?