I'm not sure what's going on tonight but LO has been waking every 15-20 minutes since her bedtime at 730! She's 10 weeks and has been sleeping from 8-7 waking 1-2 times a night since she was 4 weeks (I know how lucky I am!).

We tried letting her put herself back to sleep which has worked on other nights where she cries out, but that's not working. I thought maybe she's just going through a growth spurt and nursed her twice, but she still woke up screaming bloody murder a few times after that.

She does have a tiny bit of a beginning of a diaper rash but I started treating it right away this morning with Butt Paste. Would this cause the waking? It didn't bother her all day and she napped well. Any ideas on what might be causing this?