Writer's Block?

Ugh! This is my life right now. Writer's block. I know it would happen one day. I just never thought it would have started about 4 months ago and has yet to go away. I can't say that all of my 'friends' have stopped talking to me. Only the ones that I'd like to be working with right now. Book 3 of The Chronicles of Amber Harris was my next project, but Amber and I aren't on speaking terms. From time to time she shows me snippets of the direction she would like her life to go in but every time I sit down to write, she goes radio silent. I can picture her sitting next to me with her arms crossed and her nose stuck up in the air. lol. I swear I'm not that crazy. And I only talk to myself when I'm alone. (At least I think I do.)
To overcome my dilemma, I've tried writing prompts, staring at a blank screen, rereading the previous books, reading other books, talking out loud (to Amber) and a few other things that will really make you think I've gone off the deep end (if you already don't think I have). So to those out there that write. Have you had writer's block and how did you overcome it?