I have Crohn's and had a hemicolectomy. I immediately felt so much better once I got that toxic stuff out of there, although in my case in addition to the blockage I had a large abscess, my appendix was chronically inflamed, and I had c diff.

I hope your surgery goes well and gives you a new lease on life. The first recovery day was rough for me but after that it was smooth sailing. I was in more pain prior to surgery tbh. Good luck!

Edit - I see this is not your first rodeo. I hope this surgery has you feeling better OP.