Sleep regression?

Diana

So, my daughter just turned 11 weeks and up until 3 days Ago was pretty consistently sleeping from around 7pm-1:30/2 am. Past two days she has been waking around 12 am for an additional feeding and then up every 2-3 hours after. This has not happened since she was a newborn and I’m feeling pretty discouraged. Thought she’d be getting better not worse (at least until the 4 month regression)?! Help! Any advice?