I thought I was gay so i decided to experiment

I'm 20 years old. i thought I was gay i used to obssessed all the time because i though I was mostly because I got aroused by gay porn. so a couple of minutes ago i went on craigslist and decided to experiment. it was another guy who was 3 years older than me. we agreed to give each other a bj, i went on first but couldnt manage to do it for longer than 3 seconds. He gave me one and during the whole time I had to think of a woman to get hard and ejaculate. the whole things was kinda weird. i dont think I want to do it again. it's weird i get aroused by gay porn but with a real guy im not interested at all. i dont even obsess about being gay nor aroused anymore. any thoughts?