I am a dirty nasty foid and I like poop. I want to poop my pants. I moan a little bit and my clit wiggles every time I take a huge shit. I am a dirty worthless disgusting woman and I should kill myself immediately.

I used to have that in late teens/ early 20s due to being a overly confident dumbass when moving furnitures as well as working a physically demanding wagie job.
On one day in particular I even woke up with such severe lower back pain that I literally could not walk, if I had to move out of my bed I'll crawl on all fours like a retarded dog and even that was painful as shit. The pain would travel down the nerves of my left leg and foot somehow. God that shit was awful.

What apparently "fixed it" for me was doing multiple different exercises I found on youtube as well as never sleeping sideways. I either lay on my stomach with a tilted head or on my back. It didn't take all that long for the pain to go away, if you're consistent with those exercises (multiple times a day) they could be gone in a week.
Also sitting in a compromised position (such as gaming on the couch with your body and head tilted forward) would bring back the pain after a few hours.
I put fixed in quotation marks because I'm not sure the problem went away, I just simply got rid of the pain in a natural way. I never went to a doc but I probably will if it ever comes back. From what I understand the only real fix would be surgery, anything else is symptom treatment.
My body is quite asymmetric and I'm not flexible at all, which might be related to that but I can't tell for sure if it's always been like this. I'm currently working on my flexibility and core muscles though because I've realized how important they are for my workout goals.

And lastly I don't lift weights. I do calisthenics. So I honestly don't know if weightlifting is healthy or even acceptable while dealing with lower back pain. From what I've heard though you're not supposed to put it under a lot of stress, it needs mobility first and foremost.
Hope this helps