I tried going to other folders to attempt to download photos and it's just not seeing that there are photos saved in there on my computer. I have used Lightroom for 4 years now and have never had this problem.
I have never used the drag/drop method of importing images into Lightroom. I have always used the import dialog and have mostly imported images directly from the cards and placed them on the hard drive. I am sorry, but I don't know how to offer any more help in your situation. Whenever I have imported images that are already on my hard drive, I have selected the folder in the left hand panel of the import dialog and they have appeared in the main screen of the import dialog. It would seem that with four years of Lightroom experience you should be comfortable with using the program, so I really don't know what to tell you.