Is not unusual at all to not have a period from time to time while you're on the pill. I wouldn't worry about it.
Ohh oooo did u took a testttt
Did you take the pill daily? Did you take it at about the same time each day? If so, you are probably alright.
I've had my period do weird things on rare occasions. During my first year or so on the pill, I had an occasion where it decided to skip its usual third day without a regular pill start time and wait until the day before I started my next pack to start. Just a few months ago, I didn't have a period altogether. Not pregnant!
Since you're just starting the pill, it likely is just your body trying to get used to the pill and how it's going to react when the hormones are withdrawn during that placebo pill week.