Steady Megan, do NOT panic!! Do you mean the slightly pinker area near the top of her udder in her white area? If so then I would think she just has a little skin 'rub' area, maybe from all the walking she did a couple of days ago - or even by rubbing on the fences?
Mastitis will be in the actual quarters of her udder (not right up there) plus the mare or cow or human or dog etc etc will normally be off colour/feeling ill for several days before the infection reaches the udder, which will then turn warm/hot and eventually really solid if let unattended. Once in the udder it really is unmistakable and extremely painful to the touch. I dont think Laney has or is brewing for Mastitis Megan, so please dont worry!