I would call & ask like the person above said. Definitely talk to your doctor in the morning. I have anaphylaxis when stung by bees. They told me to carry my epipen (shot) & take it, then go to the hospital if I got stung. They told me to do what I normally do, but get monitored. They may want you to come in since your immune system is low, due to being pregnant & the reaction
could be worse or cause a fever.
I would call L&D and ask them, just call your hospital and ask for labor and delivery, and ask an OB nurse, I don't think it'd be an immediate concern, but I'm not sure, definitely call and ask.