2 week old doesn't settle on feeds and I'm about to lose my mind. I've not slept properly since he was born and I'm so exhausted
I use both formula and express as he didn't and doesn't latch 
After each feed he tightens his stomach muscles as if he's constipated? Constantly looks like he has wind too,I spend hours trying to wind/settle him to sleep. But more often than not he struggles to settle and sometimes once I've fed him he projectile vomits and then wants to feed all over again.
I'm so so exhausted that I've started sleep walking. My husband wants to help, but baby just doesn't settle and we're both so fed up. First time mum, I know I know, it's hard early on but is this all normal? 
He does have wet and soiled nappies but how do I know if he's struggling with something?