Migraine After Orgasm

So today and the last time my husband and I have had sex every time I'd orgasm I would get a huge headache and have to chill out before continuing. I feel bad but idk why that's happening. I've never experienced that before. I'm not on my period or pregnant(I'm 5DPO as of today). We are trying but I'm not putting it down as a pregnancy symptom only because whenever I was pregnant with my son I never had that happen. I just wish I could help what is happening. Both times I end up having a migraine and getting dizzy and feeling like I'm going to throw up. I feel bad that I can't express that I enjoyed our intimate time because I feel like crap afterwards. Has anyone had this happen?