i had my first gay encounter a few years a go and its been on and off but now i dont want to have these feelings about him he makes me horny and stuff why do i feel like this?

Im a 17 girl living on the Gold Coast, Australia. I have just finished high-school, and want to take a gap year around the world, however I have just found out that I'm pregnant. If anyone at all has any ideas on how I can deal with this, please let me know! :)