Sick afer shots?

[srm]

So last thursday (12th) i had my cat in for a teeth cleaning, tear duct flush and his yearly booster shots (he's 17 months old). They had given him antibiotics at the time, and gave us some to give him once he got home, we give his last one of the batch today.

Last night i noticed him sneezing a lot, and then this morning he seems like his nose is getting all stuffy. seems like he's catching a 'cold'.

is it normal for cats to have this happen after the shots? i'm thinking way back here, but i think the same thing happened when we gave him his initial shots and the vet told us cats do not get sick from vaccine shots.

what do you think?