Onset of flat, visible blue green veins both arms, chest, and breasts. just started necon birth control 1 wk before veins noticed. connection/concern?

There should: Be no relationship to visible veins and the birth control pill. The risk of a blood clot is low and does not present this way. I think you are focusing too hard on possible side effects. Good luck.

Blue veins.: There are many reasons for the formation of blue vein and, sometimes, birth control pills can lead to new vein formation. Whether or not there is a direct correlation is difficult to say. See a vein specialist for an evaluation.