Hello there. I know I’m probably just paranoid but I’d like confirmation. I take public transportation to work everyday and I live in a very cold state. Today, I went up to buy my ticket for the train and before I realized it, I noticed there was (what looked like) dry, frozen blood. I looked at my finger right away and it didn’t look like it was on my finger or underneath my fingernail. I immediately grabbed hand sanitizer out of my purse and wiped my hands off. I also have short fingernails which I bite (I KNOW ITS BAD) and since my hands are so dry, my cuticles have little cuts on them... lastly, I slammed my finger into a car door and am missing my fingernail... could I be exposed to HIV or am I being a worry wart? Could anything I touched before I got to my hand sanitizer (gloves, phone, purse, keys) be infected now? Please help!