First of all, just chill out man! I don't see why you are so upset. This is the first time that you have had a CEL and you and jumping up and down? And it happened only after a mear 115,000Km? Oh my! The horror!!!
Second, get the code scanned. Without the code it is almost impossible to give you any advice as to what steps to take until this one is done.
Third, You mentioned that you smelt a "egg" odor. More like rotten eggs wasn't it? That means that you were running rich and the main cat was burning the unburned gas when it reached it. See, things are starting to look up! Your main cat is still working anyway.
To sum things up.... Stop whining and get the code scanned somewhere. Until then, go buy a bike or something. Wait! Don't do that, you might have a flat if you run over some glass or something. Just take the bus!
