My breasts are SOOO itchy!!

I am 6 weeks postpartum & exclusively breastfeeding. My breast are constantly itchy!!! It's horrible. Not the actual nipple but everywhere else on both sides. I told my midwife & she said it's common to have a tingling feeling during letdown but it's not during letdown, it's just all the time. And it's not tingling, it's literally ITCHY like a mosquito bite or poison ivy. I just scratch and scratch. I wake myself up during the night violently scratching! I suffered from PUPPS at the end of my pregnancy, it was very bad but went away shortly after delivery. I never had it on my breasts though & everywhere I did have it i had bumps and rashes. There is no rash on the breasts, you can't see anything at all. I use an oatmeal based lotion on them to try to keep moistorized but I try to avoid any itching creams because my baby's face is always on my chest. Does anyone else have this??? I'm so itchy I could cry. Help!