Hillary's Health Hell

Remember Hillary's mysterious blood clot, well...

Ed Klein's new book 'Unlikeable' out on Sept. 28 says Hillary is battling a host of 'mounting health issues' including 'blinding headaches' that have 'frequently plagued her,' during the current campaign.

'She is exhausted and depressed a lot of the time,' a Clinton insider says, and has turned to sleeping pills to deal with chronic insomnia.

Some even suspect multiple sclerosis!  If true, Hillary Rodham's last rodeo ride is almost rode.