Ready to Pull my Hair Out

Seriously I am ready to pull my hair out of my head.  Troy has been on a roll the last couple nights literally screaming all night long.  We are trying our best to get him to sleep through the night.  I am not so sure this crying it out technique is going to work for him.  He is on about his 3rd hour of crying.  He stops for a little while only to gear himself up for the next round.  There is no reason for him to be crying really - He has been fed & changed.  We have tried patting his back & talkng to him to try to get him to go back to sleep....Nothing works!!!!  It is very frustrating.  They will not put him on anything to help him sleep until he is a year old.  Then there is no guarantee that will work.  Sighs!!!!  I can't tell you how frustrating this is.  The only one's that can even know what we are going through is someone else who has a special needs child.  A month ago he was sleeping fine - almost 9 hours a night.  What happened?????