Last week I got an orthopedic leg pillow to help my back.
What you do is strap it to your leg and it separates them, keeping your lower back evenly spaced so your lower back pain eases.
It’s taken a week or so to get used to it so I don’t have the lower back pain I used to have, and I slept okay last night and have no pain now.
The only things wrong with it is it’s covered in velvet so it’s picking up all the fluff from bed, and the strap seems to be for a fat leg so I’ve had to really tighten it so the velcro doesn’t match up. In fact, mine looks like the one in the picture except it’s black.
So if anyone has lower back pain or suffers from sciatica or other issues give a leg pillow a go. I got mine from a chemist and they’re all over the internet so I definitely suggest it.