That said, check out Skene's glands. You might just be seeing that opening. There is a good medical drawing on Wikipedia.
https://en.wikipedia.org/wiki/Skene%27s_gland
It sounds like you might; it's not usual to have two holes there, though double urethras are not unheard-of in both men and women. Apparently seeing two openings can indicate a complete or incomplete duplication, and it can be a "y" configuration or two separate tubes. One thing to figure out is if pee comes out of both holes, I guess. That would not be hard to check with a mirror. Then decide if it's a problem. (It's kind of hard to see how it would be, if you haven't known about it until now.) You could go see the ob/gyn and ask for a referral to a gynecological urologist if you feel like this is a problem.
Sorry, title should be "Do I have two urethras?", thanks.