Sick with cold/flu symptoms & hives 3dp5dt, help!

Ke

I had my FET on Wednesday and today have a sore throat, congestion, headache, aches and random hives/itching all over my legs and face/neck. I do not have a fever yet- my clinic said I could take Benadryl and Tylenol. Did anyone else get sick after their FET and still get a BFP? Freaking out, as this was our final embryo.