Extremely light periods for a few months, and no period yet today

Hi girls! I was hoping you could ease my mind a bit. For the past few months I have been having a very very light period, I've always had a light period but this has been even less than that. I've been taking Lutera for about 2 years with no problem, but I did have a few hiccups with it this month and took the extra precautions. I track my period and I always wake up with it on the last Wednesday of every month and it goes on until the next day. I've had light cramps this morning but no period yet and I'm kind of freaking out, any advice? Or has anyone else experienced this

Edit: for some additional information I turn 20 in a few months and my light periods always come on the days they're supposed to and are a very dark almost black color