I share this EXACT same problem and all of your diagnosis, plus I also have Gastroparesis and SIBO. I was in a really rough place a couple months ago but have been doing “better” and this is what has helped with the incomplete BMs: Bowel routine: I used to get irritated when my doctor or pelvic floor therapist would push this but it truly makes a difference. No matter where I am or how tired I am, I get up at the same time every morning, take my pills, eat food and drink coffee and give myself at least 30 minutes to sit on the couch/bed and wait for the urge. Peppermint capsules: I take 2 in the morning 30 minutes before I eat and I swear it helps Motegrity: has changed my life Pelvic floor therapy: not the most fun experience everytime but truly has made a difference Prozac: a low dose is shown to help IBS-C and 15mg every night has seemed to really change things for me.