I think my (almost) 3 month old is going through sleep regression??

For the past 3 or 4 days now, my daughter has just, not been sleeping much. She'll fall asleep but only stay asleep for about 45 mins to an hour and a half then wake up. The only way she'll *stay* asleep is if I'm holding her which is unrealistic. I have stuff to do and I need to sleep too ya know?. I've tried everything. Tummytime, bath, play with her, then feed her and still doesn't work. I'm exhausted, what do I do?

Ps. I have her in the same room as us (her dad and i) and we keep it dark, we keep calming.music on for her, + shes in a lil sleep sack thing thats supposed to help with her sleep. I'm at all loss

Also, sorry for the dark picture lol, I didn't wanna wake her