4 days ago i missed a step getiing out of my work truck, fell onto concrete and scraped my knee on the left leg its sore but doing ok, on the right leg, i scraped it alittle and must of hit it pretty hard but it didnt hurt for about an hour later, know it has a bruise from my shoe line to just below my knee, half way around my leg and it has gotten blisters on the scrap line and a couple outside that area, with a clearish pink liquid in them, is this normal?