Can the absence of withdrawal bleeding mean pregnancy?

Hi, since December 2019 apply Belare. It was prescribed to me for severe pain during months and after a history with a gynecologist that it could be endometriosis. In addition, there is probably a cyst on the left ovary. About 3/4 times a year there was additional slouching before I finished packing the tablets. The last menstruation occurred in January during a break, another that should appear in February did not occur, another this month also... Can this mean pregnancies?