Alphacolt

Howdy, I was wondering if anyone knows what went wrong that caused all the mods that I had downloaded to disappaer. So I had just installed Mod Organizer and installed a few mods and after I launched Skyrim it was all going fine until the game crashed in a loading screen, after that I went to launch the game again through Mod Organizer and for some reason it gave me the prompt that it was my first time running Mod Organizer on this computer so at that moment I knew something was wrong. After I got it going none of the mods that I had installed were there anymore and no matter what I do I can not seem to find the mods that I did download or find out what went wrong that would cause this to happen. So any and all help would be verry much appreciated!