Pregnancy tummy pain is this normal

[Pregnancysick]

I’m 20 weeks pregnant and can feel like a pulsating all across my lower belly. At first I thought it was the baby moving or heart beat. I can feel it 24/7 it’s not a pleasant sensation. It’s driving me insane when I lie down for bed I can feel it even more and I find it difficult to drift off. Has anyone else had this is it normal?

I’ve also got the worst lower back ache can’t bend down easily

Always best to err on the side of caution and get checked out. It could be something or nothing and you'll have peace of mind.