Who or What are the doppelgangers?

[GeauxHomeLittleD]

Not a doppleganger per se, but a non-related almost identical twin. I never knew of her until when as a teen I began working in a neighboring town. People thought that I was her! We were the same age, hair color, complexion, build, height, etc. The only difference between us was her eyes were both the same color while mine are different colors. 

When we finally met in person years later it was strange. Her name was Tammy. She said people were always mistaking her for me as well. How we ended up meeting was that she ended up marrying one of my close friend's ex-husband. It really freaked out my entire friend group that he married my "twin" and it was extremely unsettling!