Im on my 3rd month on the combined hormone birth control pill and I'm almost completely through the "placebo" week (2 more days). I haven't gotten my period yet, not even spotting. But I still have some physical symptoms of my period. I looked up online reasons why and honestly none of them fit. And the pregnancy symptoms they listed I seem to feel normally while on my period (besides nausea which I definitely don't feel now). I write down and put in here when I have my period and here says 27 days ago. I'm confused but I am enjoying not bleeding.

What's wrong?? Also am I protected during the "placebo" week??