Am I just sore or is it something else?

Over the last week I've had a lot of sex with my guy. We do not use condoms because I'm on the pill and we've both been tested. There were times where I wasn't too wet but he didn't force it in. He would just put the tip in and I'd feel pressure but it was never painful. Eventually I'd be wet enough to where lube was not necessary and it was extremely pleasurable (sorry, TMI). But yesterday and today my vaginal opening has felt as if it was dry or itchy or sore? I can't exactly figure out how to describe how it feels. Has anyone else experienced this? I'm not worried, but I didn't know if it is something I SHOULD be worried about. Thanks ladies!