After sleeping through the night 10.5-11 hours straight for 7 months (if not longer), my DD1 has started waking at least twice a night, sometimes 3-4 times.

She goes to bed around 8 (7:30 sometimes), and is usually up around 12, 2, and 4. She cries and cries and cries and won't go back down until she is picked up and held by one of us, and sometimes needs to be held for as long as an hour (or else she just screams when she goes back in her bed).

This has been going on for almost a month!

Has this happened to anyone else? How long did the regression last? How do I get her back to STTN? I have a 10-month old who still wakes up every 3 hours so this is ONE TIRED HOUSEHOLD.