I know it’s tough, believe me, I know. The bidet will help tremendously, and patting - not wiping- will help. Use cream every time you go. Lather that stuff on so it creates a barrier! I still use the Coloplast clear barrier ointment and it works really well. I think i was going every hour for the first 2-3 weeks. It’s miserable but it does get better. Try and use food to your advantage with spacing out meals, eating stuff that will bulk you up, like PB, mashed potatoes, etc.
And finally, talk to someone who understands and can empathize with you. Here is a great place to start or, you may want to talk to a counselor. If you can’t go anywhere bc you’re going to the bathroom so much, consider a social worker that will come to your home. A lot of insurance companies cover it. I didn’t think I needed one when I checked out of the hospital but I wish I had. What does your support system look like! I know that won’t help the butt burn but it may be good overall. Hang in there!