Welcome galante!
Have you already read much on www.yourbrainonporn.com ? There are many stories from straight men who experienced HOCD, or had their interest in sexual activity drift toward gay, shemale, and a wide variety of other fetishes because of exposure to porn and an escalation of changing stimulation that went along with their PMO addiction. Much variety in their individual processes of recovery, but when they stuck with their reboot, they did recover. For that matter, there are also stories from gay men whose tastes similarly shifted with porn. After rebooting, they returned to their orientation as gay men.
So, it's not unusual for PMO to cause such problems as yours. But now that you know what the problem is, you're in a position to work on fixing it!
Keep journaling, and keep up the fight!
NC