Did my period come without me even realizing it?

Julia
My period is a week late and usually it comes early or on time. I've never had sex or done anything sexual so I'm getting worried. I was spotting earlier this week and I'm wondering if I just got an incredibly light period? Seriously it was so light I thought it was just PMS. My periods are usually 7-9 days long, heavy flow, and incredibly painful so I'm still scared that I'm going to actually get it in a day or so and it's going to hurt like hell. 😞
 I plan on going to the gyno soon, but in the meantime anyone have similar experiences or advice to help me figure this out?