Ditto to what everyone else has said. I used to cry in the car with Caden - it didn't shut him up but it felt strangely relieving! It is so normal hun, especially with no sleep, constant feeding and a totally unravelled life. Seriously, like everyone has said, get some rest. It is so important you look after yourself FIRST. You are an excellent mum, otherwise you wouldnt care.

Hugs to you babe, take care.