I just wanted to add, that IF it were a infection it would most likely be almost unbareable pain. It's really really painful when you get a nipple/breast infection. So it probably is just like your dr said.
Also about squeezing some out. It takes practice, and knowledge of just how to squeeze/massage/compress, and where to to actually get even breast full of milk out. So you probably could get some expressed out if you had previous practice on how and where to compress to get it to come out. But, even then you would probably only get droplets out as even after you have a baby, a new born only needs a little bit at a time as their tummies are so small so it takes up to a week sometimes before you get much out at a time. But, that doesn't mean you don't have stuff in there, even if it's just a little bit.