blue veins on the breasticles

P

I'm over a week late for Aunt Flow. my breasticles have been really really painful, was thinking it was just af showing up late since I still tested negative 3 days late. today I noticed there is 1 large vein right next to each nipple that I've never seen before that's suddenly super dark. anyone else have this weird blue vein and end up with a bfp?