Okay, this is something new...

Last night, I wad having heartburn and I was also horny so I had my husband touch me. Well woke he was touching me my heart burn temporarily went away. I had an orgasm and we didn't have sex. Then I got really nauseous and my heart burn came back. I thought I was feeling sick because of the heart burn. I took tums, drank some water and I felt better in a few minutes. Well tonight I masturbated to orgasm and now I an feeling like I'm gonna throw up again! :( no heart burn this time, but definitely feel super crappy. I usually am on my back while we/I do these activities. I'm wondering why this is happening to me? This is my second pregnancy and I have never had this problem before. Anyone have this? Or advice on how to get it to stop?