I'm very confused on my sexuality and I need help

Hi. I'm a male. So within the past year I've started to masturbate to transsexuals. Now up until this point I had been 100% straight. I think I was masturbating too much so to get off I needed a new kink. Well I masturbated quite frequently to transsexual porn. And recently I've started to masturbate to gay porn. Idk what it is but I guess I like dicks? I don't think men are attractive and I've never had a crush on a man or been attracted to one. However I guess I like dicks because masturbating to transsexual and gay porn has convinced I'm not 100% straight. I've had experiences with girls before and I enjoyed them a lot. My sexual fantasies only consist of girls. But sometimes I have the urge to maybe experiment with a man. I've tried a few times on Craigslist for oral but I always bail because in the end I don't really want to suck a dick or get my dick sucked by a guy. I know I'm not 100% straight but I don't even think I'm bi because while I have the urge sometimes to try something while horny I could never go through with it and I've never been attracted to a male. I need some help determining my sexuality because I don't quite understand myself.