Need help, encouragement, support - to stop the picking

I just found this site, tonight. I have been picking at myself since i was very little. I remember biting my nails until they were bleeding. My babysitter asked me why i was doing it. I told her I didn't know, but i couldn't stop. And i haven't been able to stop..... 25 years later. It wasn't until recently, that i even realized the scab picking, nail biting, nose picking, pimple popping and scalp mutilation, was even something that other people could be suffering from. My 16 year old sister, told me how she has been picking at herself for years - and i never noticed. Just the way that most of my family never noticed me picking. I guess we are good at hiding our flaws. Is it true that this obsession comes from abuse? It would definitely make sense, if that were the case. Last week, i really started focusing on why i was picking at myself. I tried so hard to stop - i did for a few days. My scabs were starting to heal, my skin was looking nice (for once), and then life got crazy at home. My husband has been really sick, finances are even more depressing than usual. I stopped taking my zoloft for some reason, and my anxiety/stress worsened. Finally i couldn't take it anymore, i picked off all of my scabs - even made nice fresh cuts in my scalp. Now - i can't stop scratching. Everywhere, it itches. Even though i read all the articles, describing the desire to pick and how it was caused, i still can't seem to stop myself from doing it. My husband has been lecturing me for years - and finally i can see a way out. I just need some help, advice, support. Anything would be appreciated right now. Thank you. Sarah