My niece was recently hospitalized with c-diff, and it scared the begesus out of my SIL (and my brother, but mostly my SIL). She started behaving just like you, wanting to bleach everything and sanitize everything.
I don't know exactly how contagious it is, just that it is contagious. I do know that neither my brother, nor my SIL nor my other niece got sick. Just the one niece.
C-diff is a bit scarier than other illnesses. However, you really need to relax about the cleaning. Probiotics and yogurt are great! Beyond that, your little guy NEEDS to be exposed to germs. That's the only way his body will ever build up immunities. Too much cleaning will ultimately make him more susceptible to getting sick, as his own immune system will not be fully developed.
Talk to your doctor and try to get some more specific information. You do need to be careful for a time after the illness has passed. But you don't want prevent your little guy for being exposed to germs.
I could be wrong, but I don't think germs can live on clothes (fabric). Germs can't even really live on plastic for long. Wash the clothes and wipe down the toys with a Clorox wipe. That's about all you can/should do.