did you pull your back? did you visit a chiropractor?

i did my lower back the first time in 2003 twisting the wrong way trying to carry a ping-pong table up the stairs at my parents’ house.
then again in 2008 helping the garbage guy position a dumpster in front of his truck (on snow)

try to get some heat on it,, i found that going running also warms up your back.
the last thing you want to do is sit on the floor in a crouched position, that seems to aggravate it (sometimes i do this without thinking while playing guitar).
also sometimes lying on your back on a hard floor for 10 mins helps stretch things out

My mom had to get surgery done on her back for a sciatic nerve issue, maybe surgery would help? though I know it’s a scary thing my mom is SO MUCH better because of it.

I know how frustrating it is to have pain like that and not even know what the cause is. It took me about a year to recover from a shoulder injury that I didn’t even know how I got. I still get pain in my shoulder every week or so. I would leave work crying because I didn’t know how I was going to drive without using my arm. I didn’t go out ever. It was torture to get dressed. My doctor looked at me and said its not broken and gave me painkillers.

I’m really sorry you’re going through this. Hope it heals up really soon.

Mmm, a suspect you are right about the car accident.
Untreated whiplash and soft tissue injuries can cause problems long after the intitial incident.
In most cases rest, physio and/or accupunture and light appropriate exercise will relieve it.
Vehicle impacts can also cause little things you would not think of.
When I had my bad accident many years ago it resulted in a pressure abscess on the base of my spine. Luckily it presented itself early and was dealt with, a work mate however has had back problems for years and they recently discovered a similar abscess much deeper on the side of one of her lower vertabrae.