I agree - deactivate fb for now - at least it gives you two weeks peace of mind knowing your posts are hidden. You can always go back and delete them when you feel stronger. The amount of times I used to wake up panicking and mass delete still make me cringe even now.
You can't change what's happened, it's in the past now, let it go. Stay in regular contact with your Mother and reassure her as much as you can.
This will all seem like a bad dream in time - look after yourself
