Telling my parents about trich

Hey
So I've been pulling for years and years but it only really got really bad and noticeable a few years back(I'm 19). It started with pulling my lashes but I had long, thick, dark lashes so it didn't show for a long time. But then I started pulling my eyebrows too. Around the end of sophomore year of high school it started getting noticeable and my mom was like "what's wrong with your brows?" "you need to stop pulling them out." And trust me, I've tried!!! Not only have I been pulling my lashes and brows but also my arm hair and the ends of my long hair(but that's gotten a lot better). It's Sooo hard to live with pretty much no eyebrows and so many missing lashes!!!! And what's worse is that I still live at home and have never really be allowed to wear makeup(except for a few occasions). I've tried other ways of covering it up like wearing hats and wearing my hair partly over my face and trying to cover them with other stuff but it's made me so insecure and have such low self esteem! It's hard to look people in the eyes and get close to people. And hard to even be around my family and hard to take pictures. And it's just making life so hard. Like it makes me depressed and it can be hard to focus on school but then when I get behind in school THAT makes me even more depressed and stressed and that makes me pull more!!! I've never told anyone that I have this and have been trying to deal with it myself but it's not working!!! I came so close to telling my mom yesterday cause they could tell that something was bothering me but I just couldn't!!! What would they think?! I don't even think my parents know trich exists! And I'm also pretty positive I have OCD. Any suggestions on how to bring it up to them? Or anyone successful ways you've found to stop pulling?!