5-6 month old sleep

I’m getting so stressed, i have a 5 and a half month old.

Shes waking up at 4-5am every day. During the day shes only napping for about 20 minutes at a time. I try and follow wake windows but by the time shes been awake for an hour shes hysterical but just not sleeping properly. I dont know how many naps or how much sleep she should be having at this stage but i feel like this is all wrong.