My boyfriend and I (both in our late twenties), started having sex recently. I’m on the pill and we always use protection. Not a single chance of sex without a condom. Anywho -Last night we had some pretty mind blowing sex. For one round, it was straight doggy. It was amazing, however, when i stood up after, I threw up a little in my mouth. It came completely out of nowhere; I was fine all day. Has this ever happened to anyone?