Okay...

So I know blue veins on breast are a sign of pregnancy and for some odd reason on one breast I have blue veins but only on one then I started getting them on the other one and one vein goes right to my nipple and up and my nipples are sore just my nipples when there are touched I took a test but it came out negative maybe it could just be my period coming idk but can prenatal vitamins cause blue veins on breasts??????