New denture problems

I’ve had a partial bottom denture for some years now, but had to have a new one made as I had a new crown , causing the old one to not fit properly.
Taken ages to sort out as I have a fair bit of bone shrinkage , so back and forth to the lab,
Anyway. Have had it 3 weeks. Had it eased , but even now it’s rubbing badly and I will have to return yet again to the dentist.
Has anyone else experienced this .