Rashes and itchy body

Hi mummies, I'm coming to 36 weeks and I've been having rashes that looks like insect bites all over my feet, hands, inner thighs and even my back. I've spoken to my OB and he gave me moisturiser, steroid cream. I even soak myself in oat bath. However, the itch is still there and I having sleepless nights trying to not scratch myself crazy. Wondering if anyone has been thru this and can advise me what I can to reduce/stop the itch. #1stimemom #advicepls