Widgets have disappeared

Hello, Most of my widgets have disappeared. Everything was fine earlier today. I added a new text widget which showed up fine. I then tried to reposition my widgets and this was when they started to disappear. I now only have one, my top position widget. I have tried deactivating all plugins, no change so reactivated them all again. I have also checked to see if the widgets had been moved to inactive. They haven’t.

If you need to look at my site, it’s http://wendytomlinsoncoaching.com/

Thank you. Any help greatly appreciated.