LO is 6 months old and is waking every 3 hours at night (before the 4 month regression we would get an 8-9 hour stretch). A few days ago we moved LO into the crib in his older brother's room (2 year old) thinking that co-bedding might be the issue and hoping that it would help night wakings but it has not gotten any better! It seems that he is actually hungry as he has a decent feeding every time but he's a big boy so I feel like he should be giving us at least one longer stretch. I seriously feel like I have a newborn in the house again and the fatigue is so hard.

Any ideas? Should I be pushing more solids? Letting him fuss longer? Something else I'm not thinking of?