Post partum depression

I just had my gorgeous lil one and ADORE Him. That being said I've been having problems sleeping if he makes a single sound i jump and check on him, if ye doesn't make enough sound i am anxious. A lot of the time i can't seem to put him down, and just want to cuddle ALL the time. And find even though i adore him I'm sad no reason just SAD and exhausted. My birth was excellent textbook awesome yes some bad tearing but I'm healing well. So why this stupid sadness!?!