Just had anal sex for the first time. I stood up and felt really dizzy. shortly after, i fainted. Then when i regained a bit of my consciousness, I felt like vomiting. My bf got me to the bathroom however, i lost consciousness again. I couldn't feel my legs. i had a warm shower as well as a steam in the bathroom then i got better. But now, i still feel a little light headed. Does it get better? what should i do? what if this happens all the time?