Can not attach featured image to post

If I try to select an image as a featured image from the media library it will not allow me to. As soon as the media window opens, a blank image is pre slected and even if I select a diffrent one, it will not load up. I reset WP, which led me to loosing my data base and having to spend the last 5 hours restoring it. I thought maybe that would work, but NO. This only occurs when selecting featured image for a "POST" or "article" in this case.
I am COMPLETELY stumped. It started around the time I activated the Hummingbird, however I deleted it, and still nothing, started it back up, nothing, turned features on and off nothung..HELP PLEASE!