Uhhh any medical professionals please help

So basically i was playing with my straw like put your finger at the edge of the straw and hold it for the drink to be stuck in the straw (its a bad wording im sorry) and sooo when i checked my finger after i released it, it bruised quite bad due to the straw. I thought it was only for a moment, like blood accumulation and shi. But then it has been a few minutes and the dark patch hasn't disappeared. Then i thought "lemme try on another finger." And it was okay. Nothing serious like first one. I was thinking its normal but then the dark patch is telling me that's internal bleeding and i was like "HOW CAN IT EXIST" SO YEAH PLEASE HELP ME IM PARANOID