B.C.
Every mom knows how you feel, please be more patient. She will roll her self over before you'll know it. Please don't let a 4 month to cry it out. When they are so small they communicate through their cry, something is wrong. Is the baby hot, cold, the pjs are too tight, teething, possibly gas if being on her belly is her preference. I hope you will be getting all your sleep you need soon.