Anyone take Benadryl while pregnant? My doctors office is closed for the weekend so I can't call to…

Anyone take Benadryl while pregnant? My doctors office is closed for the weekend so I can't call to ask about the risk and if it's ok to take and I showed the rash to my grandmother who was a nurse for 20+ years and she said It looks like an allergic reaction. The only thing new that I can think of is I have tried was suave body wash the other day and I took a very hot bath in our tub in our new apartment instead of a shower and the maintenance guy had used some kind of white spray paint type thing to make the tub look better then what it did before so I'm wandering if maybe the very hot water was breaking the paint down and it irritated my skin.