What should I do?

Around 2 months ago my so-ocd/hocd started after meeting up with a girl I had been messaging and when we met up I realised I wasn’t attracted to her at all. When we were hanging out and we were about to kiss, I felt disgust and didn’t want to kiss her and so just hugged her instead. Once I got home afterwards it then sent me into the spiral of thinking what if I’m gay and that’s why I didn’t want to kiss her. And this went on for a few weeks until I did research and discovered hocd and it matched completely all of my symptoms. Some days are really overwhelming and others aren’t as overwhelming because at some points when the hocd isn’t on my mind, I act exactly how I would’ve done prior to this, but then it creeps into my mind and I find myself constantly analysing people and situations and past experiences, which is extremely overwhelming and stressful. From my research I have discovered that exposure response therapy is the best way to stop this. However, I would like to know if there’s a way to either do this by myself or to not have to pay for a therapist etc because that would mean I would have to reveal this to my family, which would be embarrassing, misunderstood and I’m pretty sure they would just mistake it for me being gay in denial, which would just make the situation worse and just overall I would like to overcome this without having to go through that if necessary. I am currently messaging a girl who I find attractive and I am sexually attracted to but obviously this is affecting my thought process and I don’t want it to affect my future relationships. So if anyone could help with how to overcome this with the conditions and through exposure response which is suggested, then I would really appreciate it.