Hi. I was stung by a bee on the back of my neck on Saturday and went to the ER for treatment. I'm on 3 different medicines (Ibuprofen, pepcid, and diphenhydramine. Last night I started getting a throbbing feeling in my head. I woke up this morning and was OK but after a few hours the throbbing came back. I'm 27, 5'5'', and weigh 126