Do not worry, milk will not give you ovarian cancer, Kindred.
Seriously, milk is fine, soy is fine, meat is fine, carrots are fine, all these things are good for you... in moderation. That is, make sure you have a wide variety of foods, do not drink only milk or eat only chicken or whatever. Have lots of different stuff.
Plus, most of the studies they do trying to show that this or that food gives you cancer, they do them on sedentary individuals. If you leave your bike outside in the rain over the winter and it gets rusty, did the rain cause the rust, or was it really that you weren't riding and caring for the bike?