Was it before or after you stuck Moochie with it? It really shouldn't make to much of a difference either way actually - if this was before you put it under her skin, it would have been sterile and all you did was give yourself a cut. If it was after you had given her fluids, there is a chance you might have brought something that was on her skin into your finger, but it shouldn't be a problem if you washed your finger out good right afterwards. With cats, the bad bugs for people are in the cat's mouths, that's why alot of people react so badly to cat bites.
I'd just keep an eye on your finger, if it gets really sore or starts to get red or swell, have it checked out - but I think you'll be ok.
I'd just keep an eye on your finger, if it gets really sore or starts to get red or swell, have it checked out - but I think you'll be ok.