I stopped to take tri-sprintec b/c pills. i stopped to take them suddenly and after that i missed a period can that be the reason for missed period?

Missed Period: It is not uncommon for a woman to miss a menstrual bleed at one time or another during her reproductive years. This can certainly occur around the time of discontinuing birth control pills as well. However, any time you miss a menstrual period, if you have been sexually active in the past several week, you should have a pregnancy test done.