I'm 23, male. So I did something very stupid today. A bat happened to fly into my room and landed on my bed. It was tiny, and I thought I'd let it out, so I tried picking it up with my left hand. It turned is head around and bit my thumb. There are no visible marks, not even a tiny scratch. I immediately cleansed with lots of soap and antiseptic. The teeth did not pierce the skin. I've heard a lot about bats transmitting rabies to humans. But there's no visible bite mark of any sort. Should I be worried?