Ladies I need your help!

Little back story. My period was 15 days late finally came this past Wednesday. Since last night I’ve been having this awkward pain in my lady area. It’s right in the opening only on the left side. I can’t even describe the pain it’s just so weird but it freaking hurts today is cd 4 I’ve tried everything to make the pain go away. Nothing at all is helping I go back to work tomorrow 16 hr shift so if someone can suggest something I’m willing to try it! Please and thank you. Also no it doesn’t burn when I pee