Son has chickenpox?

El

Basically I'm writing in here to see if anyone has had anything similar. My son has just got chicken pox and came out in the spots today, I'm 16 weeks pregnant and have never really heard of chicken pox being a thing discussed about when you're in contact with someone who has it whilst carrying a baby. I honestly don't know if I've had them before and if I have I can't remember and must have been very young. I did ring my doctors to get advice but I'm waiting on a call back