text: Could be off, happens now and then.  My husbands' grandmother use to say that every 7 years your body changes. *shrug* I don't know if that's true. . .\n\nAre you possibly pregnant? If it happens again next month I'd make an appointment to see a gyne.  I didn't have a gyne until I was married (21 as well).  I needed to find one becuase of a particular problem. Turned out to be a rare yeast infection. .. doesn't seem to apply to you. But still, a dr may be able to find something that can help you. Good luck!