I just had my first gay sex experience and i vomited afterwards. why?

Many posssibilties.: It's pretty common after intercourse because the abdominal area is stimulated. Depending on what particular activities were done, different parts of the GI tract are stimulated. ANd, there's a lot of activity and you might not be physically fit for a burst of new activity. Finally, there are anxiety issues that could result in that. cannot say in your particular case, but generally, gets better.

Emotions: Congratulations on your experience. A majority of guys explore this stuff, even though only a minority prefer a same-sex partner for the long-term. Thankfully, society's more tolerant today than in the past, but there's still stigma in some circles. You may have gained a lifetime friend, or discovered what's right, or not right, for you, and you've shared love -- which is always to be cherished.