Am I bi?

Okay so what I thought was hocd probably isn't. I want to have sex with woman but I can't tell if I'm attracted to men or women. 3 months ago me and a girl had sex a couple of times and I did get erect. But now I am noticing men too and only really hot girls. Idc if I'm attracted to men as long as my penis will still go up with a woman. What do you guys think? Btw I tried to watch man masturbating and a woman masturbating. My dick went up to the girl but in reality I'm confused because all my life I have been straight . Hope you will take the time to read this as I would love to read your insights people !