Stopped birth control missed period

lacey

So about a month and a half ago I ran out of my prescription ( Try-lynya) and I haven't had vaginal sex since. My last period after stopping felt like it lasted forever, like a full 8 days when I'm normally around 4 days. I was supposed to start my next period 5 days ago. I feel all the symptoms but no blood, is that normal or should I be worried?