Daughter waking up crying a lot


So for the past week or so, my daughter has been waking up multiple times a night crying really loudly, it takes forever to get her back to bed and then it usually happens again a little while later. I dont know what to do. She was having a few days in a row where at about 9:30/9:45 she would wake up screaming and freaking out calling for me. I have a 3 month old too who wakes up from it and I just started back to work a couple weeks ago so I'm barely sleeping anymore. I dont know what it is or what to do