Does Everyone Have Veins Showing On Their Chest???

I am still trying to find out if I am pg, or having side effects from bc, ( it is still to soon for a test I think) so I have been posting in the bc forum, but this question felt more fitting in this forum. I know a lot of you have stated that u got veins across your chest and through the nipples, but does evey one normally have visible veins in their chest even if they arent pg?? How do you tell when they are signs of pg if u can usually see veins in ur chest and in ur nipples? I have been studying mine a lot lately, lol, for these changes, but I noticed I have a vein going around half my right nipple, and I don't know if that was always there, does anyone else have this? I also know most people report that their montgomery glands (little bumps on nipples) have become more in number and in size. But I have always had a lot and they are always above my skin, like brail dots. So again how do u preseve breast changes when I already have a lot of there signs normally??
I have been having many other pg sxs but again I don't know if it because I am pg or from the bc. Because of the bc I did't have a period for 3 months, and I went to the Dr. And I was not pg but do have adenomyosis, but then january 16th I finally got my period, but a verry light one, and since then I have been feeling crappy and crampy and all the other normal signs of pg, or side effects from the pill.
I should be getting my period next week if all goes normal, but I am just so confused and I feel like crap. If you guys need to m=know my other sxs just ask and I will tell, I just don't want to make this post any longer than it is... Thanks, kellyj.