33 weeks pregnant w rash and itch....

Jordan
Monday night I couldn't sleep, so Tuesday I left work early to come home and take a nap..when I woke up I noticed red dots all over the tops of my breasts, and they had already been in severe pain all day too...called my drs office they said it's normal. Then I notice it had spread to my legs...they said take benadryl see if it helps. Now this red dot rash is ALL OVER my WHOLE body and I am itchy. I feel like my drs office isn't as concerned as they should be?! Is it just me?? Has anyone else experienced this or know what it could be? I can't seem to find anything that matches it exactly when I look it up. Not to mention my whole body has become more and more sore as the rash gets worse also. Standing up hurts b.c even the bottom of my feet are sore! Almost like all my muscles and joints just hurt. The closest thing I've found it could be is prurigo of pregnancy but I'm not even sure about that. PLEASE HELP. I'm probably going to call my drs office again tmrw and tell them it's just worse and worse, my mother thinks maybe I should just call my primary dr instead of the OB. But I can't help but to think everything I go through is pregnancy related, ofcourse lol. It's really awful though 🙁😭