Good advice from scully! Above all else it is very important that you don't isolate yourself from your TRUE friends, which will hopefully include members of your church who should be on hand to support you. After reading your last post suggesting it is impossible for you to escape your present situation, I think it is extremely important you do not become isolated!
I would suggest joining facebook again using a name that is not obvious to your JW relatives and make it strictly private, so that only people you trust, that you have personally invited and accepted as friends, can be part of it. That way you can at least let people outside your home know what is going on, and seek advice and help from them when it is needed. Even then, if you need to discuss personal matters it is often best to send private messages to individuals rather than open messages that all your facebook friends can read, just to be on the safe side.
Take care and I wish you well