Try not to worry. This is very, very common. I went through it a couple of years ago, and that's when I found out how common it is. Here's the thing: in an effort to find the bad stuff, they find all sorts of stuff you wouldn't know about if they weren't looking for the bad stuff. It's generally not problematic. Also, dense breast tissue does lead to more tests, because they can't see what they are trying to see. My last mammogram was almost solid white (i.e., dense tissue that the camera couldn't see through), so I got sent for a couple of different tests. It's hard, I know, but try not to worry. Sending lots of positive thoughts your way!