Hi ci, welcome to the forum.
I don't have OCD, but I have three children as well. It's bad enough we have to deal with our mental illness, but it just makes it worse when you worry how it's affecting your kids, and that you're not your "real self" anymore. I actually told my 16 year old that I had depression (as he asked about my medications) the other day. I took that as a good opportunity to have a talk to him about depression, and to make sure he was okay, as he's just started his year 12 studies. The other two are 13 and 10, a bit young to really understand.
Psychologists are good to talk to. I feel you really need to feel comfortable with them, though. You need someone you feel totally comfortable taking about everything with. Otherwise you will find yourself holding back stuff or not being honest. There's nothing wrong with shopping around for the perfect one for you.
I didn't, until recently, tell many people about my depression and anxiety. It is a hard thing to do. It's because people don't understand mental illness. It's the fear of the unknown. But I now believe it's more helpful to tell people. I feel like a huge weight has lifted because pretty much everyone knows now, including facebook friends. It surprised me how many other friends online etc came forward and said "I have depression, too". There's too many of us suffering in silence.