Sunburn

Today after working in the heat, the girl I work with and myself decided to go swimming at Hickory Creek. So on the way home, I stopped at the family dollar to buy a floaty. Got it home aired it up then off we went. I applied more sunscreen than usual with it being so hot out. I even read the bottle...It is SPF 30, and in large letters it says EXTRA WATER PROOF...Since I thought this was the case, I swam my little butt off and what happens when I come home and shower. I realize that I am red as can be. DANG. I thought I was doing good by putting on sunscreen. Should have never trusted that it was waterproof!