Hi. I’m A 16 Year Old Girl And I Don’t

Hi. I’m a 16 year old girl and I don’t know how, but I have two vaginal openings. When I inserted a tampon for the first time and discovered that I have an extra opening. The dirst time I used a tampon, it hurt so i took it off and tried to put it back in, but the second time didn’t hurt at all. And I can insert a tampon in both of them. I don’t know if it’s normal. Please help me understand the situation. Are there ant consequences, or things that should be surgically removed?