Wth happened! My replays are gone!

I just found a game where (ghost) i killed a soldier SO CLOSE TO THE ENDING OF ROUND that it actually killed him THE NEXT ROUND.

That was the greatest thing that ever happened to me, and i wanted to put it on youtube. So i turned it to windowed mode and got out hypercam.

When i got out hypercam crossfire lagged, and the screen turned black where my mouse was. I clicked on it and it stopped, and when i clicked on replay

IT WAS EMPTY. I KNOW I HAD MORE THAN 10 VALUABLE REPLAYS IN THERE AND NOW ITS EMPTY!!!

And right after i got out hypercam too! WTH! IN THE LAG IT DELETED ALL OF MY CLIPS! WTH???????!?!?!?!??!?!?!