there is nothing wrong with you that good sound deep undisturbed sleep won't cure, but trying to get it now will be close to impossible. When a woman has a baby remember ....she has essentially given up what she "needs"

to take on the Baby's....
Hang in there you'll get yourself back to the "girl" you were before , remember with all the joys of being a mom, it's still a major life change for a woman and being solely responsible for another human life so completely which lets face it a baby does need its "Mommy" to survive will at times give any woman new to its enormity every symptom you described.