Probable Enterocele and chronic lower back pain

I'm new here, so sorry this is so long! But I could really use some advice. I'm 34, have no biological children, and have had no major surgeries. Over the past 4 years I've been through so many tests, medicines/supplements, doctors and other specialists, and different diagnoses.

I've had constipation off on my whole life, but it got way worse when we went from 1 foster child to 4 (all aged 4 and under) in 2014. The stress (physical and emotional) and the lifting, I think, contributed a lot to this. I tried many typical remedies and ended up using enemas, but eventually, those weren't working either most of the time. Whenever I pushed, I couldn't go. After much trial and error, I've gotten my constipation mostly under control with a very precise combination of Miralax, Benefiber, a really good probiotic daily, a low FODMAP diet, and Senna daily just at the right time in the evening. I can still only go in the mornings about 20 minutes after breakfast, but at least I can go. And I only need enemas every once in a while. Seeing a physical therapist who specializes in pelvic floor dysfunction helped guide me in exercises, kegels, and advice as well.

However, in the meantime, my back pain, which I didn't realize was connected at first, has gotten way, way worse. Strangely, the better my bowels/constipation got, the worse and more constant my back pain got (used to just be occasional episodes of "pulling" my lower back, and now it's an almost constant dull ache that gets worse as the day progresses and after meals). As the back pain worsened, my feeling of bloating got worse again, despite still being on the low FODMAP diet. Now I'm beginning to wonder if it's really bloating or just the feeling of fullness from my intestine or something falling and pressing on everything down there.

Eventually, my back, which became more of a problem than my gut, drove me to try a chiropractor. That only made it worse. I felt like my muscle (pretty sure the quadratus lumborum) was so tight that correcting my back alignment just made the muscle spasm and caused more pain. Recently I tried back injections. The first one was a joint one, and it kind of made it worse. Then 2 weeks later I tried the muscle injection. That was a few weeks ago, and things have been even worse. Since then I have had maybe 1 evening where I felt decent. I have to lay down a lot just to relieve the pain. Sitting for too long aggravates it too.

My physical therapist had at one point diagnosed me with, based on her description, enterocele (although she'd called it something generic), after a rectal exam with me bearing down. It may be in my head, but since I've been reading about enterocele recently and realizing that my back pain probably isn't improving because the enterocele isn't proving, I truly feel like the enterocele (or whatever prolapse I have) has gotten worse just since the last injection - my insides/gut feels worse, not just my back. Keigels have been much harder to do since.

One thing I have noticed after finding this website is that I do hold in my gut pretty much always, but especially when I'm stressed. I've been trying to relax it and push it out like the posture thing says, although I'm pretty confused on the rest of the posture. When I notice and push out my gut, it does make my back feel a little better...temporarily. I'm wondering if I should try the posture belt. I also have an appointment scheduled with my gynecologist early April and plan on asking her to test for enterocele and about possibly trying a pessary.

Oh, and I forgot to mention I also have bladder issues that occasionally give me the sensation of a slight UTI coming on but is probably just my pelvic floor spasming - this happens more often in the evening. And lately the frequency issue has gotten worse. I feel awful if I have even a slightly full bladder and feel so much better after I go.

I'd love to hear thoughts, opinions, and advice!