Switched from Cyanogen to Warm, now lost half of my pictures/videos...why?

[TheLovatScout]

Just as title says.

Went from Cyanogen to Warm 2.2, and once I had Warm all my pictures and vids were there, and everything was fine. And I don't know when exactly (since I don't look at past pix and vids everyday) but sometime ago a certain group of my pictures and videos are just gone now, I used Astro to look through the entire SD card for them, and they're not there. I heard Astro has a lot of problems with SD cards and it did say mine was damaged and shit, so I uninstalled Astro and since then the SD card is fine.

It sucks though because I fear that all those files are gone forever now since they are no where to be found on the SD Card.

But I really want to say that this happened to me before and they came back eventually, but I can't be 100%.

Anyone know how to help?