If the kitten had rabies, it would be dying or dead.
Do some deep breathing exercises. Try some meditation. Then tell yourself you are 100 times more likely to be hit by lightening than contract rabies from a healthy stray kitten.
Hon, I've taken in hundreds of stray cats through the years. And I'm not exaggerating. The worst thing I got? Fleas. I've been bitten, scratched, vomited on, pooed on, peed on, had kittens born on my lap, and not one single illness to show for it. :(
Worst injury I ever got from a cat was a bite. One of my own darlings was under the couch with his tail poking out. I never saw it until it was too late. He let my ankle know on no uncertain terms that standing on his tail was unacceptable. I ended up needing stitches and a round of antibiotics to combat the massive infection that was pretty much instantaneous, but today you can barely see the scar.
I've seen rabid kittens, it's not pleasant. Because they are so small and their immune system is not developed yet, the succumb quickly. They are limp and lifeless and usually die within days of being infected.
You are fine darling. And you can trust me because I was going to be a nurse once. Until having kids interfered.
Gale