Boyfriend Allergy? (Sexual) My skin?

Yesterday I had sex with my boyfriend, and he finished on my face. Usually I just wash it off with no problem, but right afterwards, my skin started swelling and turned red/raw everywhere the fluid had touched, especially where it had gotten in my eye. It went down after 30+/- minutes after I had taken an ibuprofen for the swelling. I didn't worry about it much due to my already sensitive skin. Today, after we had sex again, I noticed I had hives in the places that he had kissed me (stomach, neck,shoulder). Neither of us have any STD's that I know of I was tested a week/two ago) and i have no known food/other allergies. I have Hashimotos thyroiditis and anorexia and am taking Adderall and Synthroid. He was also sick (the flu I think) and was taking antibiotics a week+/- ago if that makes a difference. Could I have reacted to an allergen passed through his bodily fluids? Could I be allergic to his bodily fluids in general? Could the acidity of his bodily fluids be irritating my skin?