Need Advice!

My husband is a DEEP sleeper. But the problem is he moves a lot! He often flails around his arms or legs or throws them over me in attempts to cuddle. He doesn’t mean any harm at all.

Here’s the problem: my bump is starting to develop and he’s knocked me in the stomach a few times. It’s honestly quite painful and scary. It makes me worry he’s going to accidentally hurt the baby. We don’t have a couch so the only other sleeping option is the floor. Any tips on how we can both sleep in bed while keeping the baby safe? Build a pillow wall?