I had a bite on my leg that woke me up in the middle of the night on Wednesday night because it was so itchy. Thursday day, it got a little bit bigger and it started to hurt more than it itched. Thursday night it got really hard, and swollen, and it started oozing clear fluid. Today, it s much bigger, still swollen, and when you run your fingers over it it feels like it has goosebumps over it. What could this be?