Help! Veins showing up in breast

TTC #1, and I'm only on cd 14..  We have been trying for baby, but I last had my period the 31st so I feel like it's too early for symptoms. Af isn't due until Feb 24.. But my boobs have been SUPER sore the past 3 days, and just noticed tonight how "veiny" they have become! I regularly take a peek at my boobs and have never seen veins there or so blue before! Is this an early sign of pregnancy?