HELP!!!!!

Okay, so we're having issues with night time. Tate has great days...terrible nights! AHHHHH! I don't know what to do! I shouldn't say his nights are terrible per say, but he definitely is fussy at night. I think we've gotten past the inconsolable stuff for the most part...those moments are few and far between, but he still will not sleep at night. I am EXHAUSTED! I am talking, he won't sleep more than 15 minutes in his crib without waking up crying. He won't sleep in anything but his crib, we've tried to let him cry for a while to see if he'll go back to sleep, we've tried having him sleep in his pack and play in our room (like he did in Florida where he slept great), we've tried what seems like everyhing! The only time he ever sleeps for long periods and sleeps well is during the day. He'll sleep in his crib for an hour or so at a time during the day and he'll sleep in his carrier during the day too, but once night comes, he wants nothing to do with sleeping. Really, I will try almost anything at this point! Any suggestions are welcome...