What is going on? 😭

My LO is 28wks (6.5months), and she finally started sleeping well at night. She’s breastfed and was waking up like 2X.

Now in the past two nights, she’s started waking up 6-7X. Sometimes as quickly as 15/30mins of falling asleep. What is going on? Is this another sleep regression?

PS: She came out of Leap 5 last week. Doesn’t seem to be sick or teething.