itchy

 I'm 37 weeks 5 days & FTM I've got these bumps on my stretch marks only when I itch them they appear I showed my midwife and she said it's normal but it has spread the to top of my belly and under my boobs. It's killing me I just want to scratch to death I've been jaunty vitamin E cream witch only helps when it's on and once soaked in it gets itchy again. Anyone else had this?