11 month old sudden sleep drama, help!

[RookieMom]

Hi!

I'm a first time parent and my son is now just over 11 months old. He's been sleeping through the night for quite some time now happily in his own crib.

Now over two weeks have past and it's been drama every night. He'll wake up around 12.30 and refuse to go back to sleep in his crib. He'll just cry and get hysterical. So the only solution we found is to let him sleep with us.

He's happy to nap in his crib, just won't sleep the night there. He is still sharing a room with us and his crib is next to me.

Once he get in bed with us he's asleep pretty much right away.

I'm at a loss what to do :-(