Awww, Nita you poor thing :hugs:
You're not a bad mother! I think being sleep deprived for 7 weeks would definately cause your stress levels to rise!
Do you have someone else you could call on for help.... Mother, sister, sister in-law, close friend? Someone that could take bubs for a couple of hours to give you a sleep??? Bub will probably cry for them, but it really doesn't matter! They will understand why you need the break. It would be great if you could have someone (or a few different people) come around most days to give you a break. Just until you're feeling better!
Its not that you're doing a thing wrong that your baby is unsettled! Some babies just cry and thats ok, but you really need to think about yourself and your sanity.

Chin up sweety. I hope you are feeling better soon. Your baby is lucky to have you!