I am not a doctor and have OCD to an extent so i don't really know much about it though. i think it deals with obssevive thoughts and actions. i think you are obsessed with the idea you may be gay. it sounds like you aren't since you don't want to be. you say you are attracted to girls, you are just worried you may be gay? it is probably a sort of a phase you may be going through because of your diagnosis.