Stopping birth control = no period?

Dallas

I stopped taking birth control a month ago so this past week should have been my first period without it but it never came. Not even spotting. Could it be because of stopping the birth control? I've been talking it since I was like 14 or 15 and I'm now 21 so maybe my body is having a hard time adjusting to not having those hormones added every day? I'll take a pregnancy test in a few days just to check but I was wondering what you ladies thought