Could this be why my baby’s sleeping habits changed!?

This past week my baby went from waking once for a feeding to 3-5 times!!! My daughters sleep sack has very little room left at her feet! No more than 3.5 inches when spread out. But since it gets bunched up when she’s sleeping, it’s almost like she has no room. Could this be why? Has anyone else’s child do this? Or is it the good old sleep regression 😅... She’s 19 weeks tomorrow