Welcome to the forum.
Your symptoms could be due to disc prolapse
in the lumbar area. However, it could be minor as you do not have leg pain.
It could also be a mechanical pain due to muscle strain
Now, you could try analgesics such as diclofenac
If symptoms persist, you could see a doctor and get MRI Lumbar spine
I hope this is helpful to you.
You can consult me again directly through my profile.