Still.Not.Sleeping!!

My LO will be 8 weeks on Friday and still sleeps horribly! She wakes up starving every 2 hours or so, about 5 bottles a night.. I'm going nuts! She is great at getting herself back to sleep but is up all night practically. She will take 3-4 ounces a bottle and after that spits up so I know that's still her max. I have tried cluster feeding at night but it's not working. We co-sleep but I've been trying other things to see if she sleeps longer, pack and play by the bed... Rock and play... Swaddling.... Dress warmer.... Dress cooler.... Nothing. Anyone else still going through this?