Rash on belly

Ernestine
This is my first pregnancy. I'm 26 weeks and for the past two weeks my belly has been itching from stretching , but now I have small little bumps sort of like a heat rash . I asked my doctor she said it's not PUPPS she also said it looks like eczema. I don't know what to do or what kind of cream to put on to help. Has this happened to any of you ladies