All the questions I asked have disappeared from my page, what has happened I know people gave helpful answers to them which was useful, why erase them?

I looked at your profile page and can see all of your questions and answers with no problem. They are all there. I would say that it's your unit. You might try logging out and clearing your cache and history and logging back in. That helps most of those type of problems. No one erased them. We don't do that.