Baby only wants tummy...but big anger

Here's what's happening: baby has learned to roll back to belly and as soon as she is on her back, instantly rolls over to belly. She refuses to roll belly to back. If you roll her back onto her back, she'll roll right back to her belly. That's all great BUT as soon as she is on her belly it is non stop yelling as if she is frustrated. This then evolves into crying. She is 4 mo old.

How long do you let a baby yell for if the baby isn't crying?

Is constant yelling our fate until she learns to crawl? Anything I can do to help her?