So tired of this???

My almost 5 month old will not sleep. At all most days. We used to get 6 hour stretches before. Then the regression hit at 3.5 months and it never got better. She can stay asleep for nothing longer than 25 minutes most of the time. We have tried almost everything from CIO to Ferber method to patting to shushing to rocking to carrying to Co sleeping. She will scream and scream. She naps pretty well in the day time and can put herself to bed. Can’t resettle herself though. We have moved her bedtime an hour and a half earlier. Kept strict routines and times. Some days it works, some days it doesn’t. I have no clue what to do anymore. I’m so frustrated. I just want my baby to get some rest. I want to get some rest. What do I do? 😣