Last Friday LO turned 15 weeks old and all the sudden, stopped sleeping at night. She's fighting sleep, cries bloody murder until I stand her up on my legs and then she immediately starts smiling and bouncing up and down. It's been like this all weekend. She's also been attacking our knuckles and her teethers, so it may be a combination of teething and the normal regression, I can't be sure. She slept at 6am last night, er this morning!

1) How did the infamous 4 month sleep regression affect your LO?
2) How long did it last?
3) What did you do to help things go back to normal?

Thank you!