So the other day I took my Pokemon Red game out of my GBA SP (I had just been playing it a few minutes before) and put it into my brother's GBA. It wasn't loading the first times I tried it, but I took it out, blew into the cartridge, replaced it, and it worked fine.
However, as the title screen came up, the only options were "New Game" and "Option"! The "Continue" button was gone! I removed the game and put it back into mine, and sure enough, the option to continue my game is gone! Now I am extremely mortified by this as I had quite a lot of hours into that game, but I've searched the internet and found no solution other than "blowing into the cartridge" or cotton-swabbing it.
I am finally depressed into submission that my save data is somehow lost, but I have one worry. If I start a new game, is there a chance this will just happen over again? My friend told me my data was probably corrupted, so does that mean that if I start a new game it's just a matter of time until it disappears again? Should I even bother starting a new game?