Anal Issue…

As embarrassing of an issue, I am wondering if anyone else has experienced this? I have noticed lately at the opening of my anus there seems to be a bit swelling and and one side (closest to the vaginal opening) it seems more tough than the other. It’s not really like a ball and it doesn’t feel solid. There is no pain. I’m unsure if I’m being paranoid over something normal or if it is something serious. Also, I’m wondering if this sounds like an internal hemorrhoid or something common?