Missed Period on First Month of Birth Control

It's my first month of taking birth control and I am sexually active. This week I was supposed to get my period but haven't gotten it and I get back on the hormonal pill today. I did take a pregnancy test 2 weeks ago and it was negative. I also did an at-home pregnancy test today and it was negative as well. Should I still be concerned? Should I wait it out till the next month? Anybody have a similar experience? Thanks in advance ❤️❤️❤️