I actually did ...
The short story goes like this. I had the SAME issue with the twenty twelve theme. In that theme I figured out, or at least thought I did, that my scrolling news widget was the cause of this.. so I just switched themes, and got rid of the plugin.
Things have been going fine for the last 48 hours. But now this..
The one thing I did is I got rid of that HUGE silly category tag that happens at the top of the page when you leave the home screen. I just deleted it. :/ from the index.php I think. I coped it into notepad in case it happened to be the issue. I could restore it and see if it helps.
Thanks a lot for helping, and pardon my ignorance with CSS, etc. I am truly a caveman with this stuff. :)