Facing ones fears may help empower one, but OCD isn't overcome as simply as that. OCD is a stubborn habit that's hard to break. It feeds on itself, and Shrooms are well known as being able to interupt and calm it down.
Good advice in overcoming OCD is to get out more, exercise daily, have a routine, and avoid Caffeine and spicy foods. When you feel OCD coming on, get up and get out!, let it burn itself out, lose yourself to talking to people, find better, more pleasurable things to do. Remember that OCD is not good, it's a bad habit that get's you nowhere, and by instead choosing to do better more pleasurable things you are empowering yourself and making a better decision you can be happier about.
Remember that no amount of OCD will ever help you or improve matters, quite the opposite. OCD is not only a bad habit that is annoying (because it makes you feel guilty for doing it when you know better), but it's also a form of Ignorance and lack of faith to reality.
Maybe shrooms come in great here, putting ones rigidity to rest as faith in the wholeness is reconfirmed??

To be honest, i think we are all guilty of being a little OCD sometimes, and think it's normal to doulblecheck the taps are off, the cooker is off, in our "worrysome" modern age where not doing so could kill someone or mean costly repair bills. But over the topness is unnecessary, and that's where the "interupting" the negative habit comes in. Shrooms can help, and so can adjusting behaviours by choosing ones that disengage continuity.
Probably the best bit of advice is to make a checklist of your current life. Are you on top of the basics, and do you have stuff to do "planned in a diary and out of your head"??
If so, then why not make a new start and decide to really work at choosing to do what needs to be done, and when it is done to get out and do better things than be stuck indoors doing such negative uninspiring things that are totally anti growth. Get out of yourself, meet new people, do new things, there's more to life than being overclean and overorganised. Find the healthy middleground. WORK at it, sitting about is what causes the OCD!
"Eat your vegetables and do as you're told, or you won't be going to the funfair!"