4 month sleep !!

My little one is going through a four month sleep regression and I'm trying to get her to sleep better and self sooth and sleep through the night again. The only thing is when I try and let her fuss it out ( doesn't cry just fusses) she ends up rolling over! She has good head control no concern there but she will just fuss on her belly till someone goes and flips her back and just keeps doing it. It's hard to get a good sleep routine down. I end up having to rock her. Any tips and how to get her to stop rolling over when she's trying to fall asleep ?