Oh man!! Don't stress! This happened to me too xd

i was on regular ortho back when I was 16, for a couple of months. I do believe my periods started on the first day of the placebo pills. Then I was off for years, and got back on ortho-lo when I was 20. I waited for my period to start, freaking out because of course i'd had unprotected sex :p my period didn't start until the 4th day of the placebo pills, which (since I was a monday-start at the time) was thursday!

Over the past year, my period has slowly moved closer and closer to when the placebo pills start. I'm now a sunday start, and my period begins on tuesday :)