Dealing with illness anxiety disorder

I have a concern with my gut. My stomach keeps feeling heavy and I’m now having backed up poops I think, like I feel like I need to poop but ntn happens. A bit of a dull ache in my lower back butt area like where back dimples are. I’ve been experiencing a weird feeling of emptiness or sagging after first thing in the morning poops. I wanna get checked out so bad but I have illness anxiety disorder, and just thinking about going now is making me sick and my heart rise. I won’t have anyone to go with me. I hate going to doctors as I have anxiety attacks more than ever and I hate the feeling of sickness from them. Idk what to do. 😔