Hi Sheneedshelp,
I'm so sorry that you're hurting. Those images must make you feel sick. I think Facebook gives a lot of parents some insights that they probably wouldn't have had before the internet, but it's worse with someone in addiction.
I highly recommend deleting her. She knows where to find you and you presumably can be contacted by email? phone? cell phone? These are all things that I was told when I deleted my XABF a little over a year ago. It feels like you're cutting some kind of important thread, or making a statement. I guess you are, really - the "I can't watch you hurt yourself" statement. You're allowed to do that - it's ok. I felt like a ten tonne weight had been lifted when I finally hit delete and while I know it's different for a parent, you have a right to your own serenity - and a right to do whatever you need to do to protect it.
Hope this helps, better wisdom will be along shortly no doubt.
Hugs, SL.