Cholastasis

I am 35 weeks and have been extremely itchy. On my feet, legs stomach, boobs, and back. I’m scared I might have it. I called my doctor and she doesn’t seem concerned she told me to take Benadryl, I did and it did absolutely nothing for me. And said to go if i get little bumps, which I don’t have. I don’t feel like this itching is normal. Any advice?