Thank you for posting your query.
I understand your concern.
You had the bee sting
yesterday afternoon, and now you have a swollen hand, this means you don't have to worry about the bee sting any further. The swelling will persist for day or two and might itch a little bit, but that is nothing to worry about.
You can rest assured that this single bee sting is not going to cause any problem to you or your baby.
Hope I have answered your queries satisfactorily.
Do get back to me if you have any queries.