What is wrong with me.. Omg

I wanted my baby so so bad, but recently I find myself so irritated with him.. He's 9 months old and recently has started this whole scream thing.. He's constantly crying even when there is no reason to cry.. All needs have been met. It makes me want to cry and pull my hair out.. I want to scream shut up at him and it makes me feel so bad.. I feel bad that I get angry. I'm such a horrible mom... He doesn't even seem to want me anymore. He always wants someone else...