In the current scenario, the best thing to do is to see a gynecologist, undergo a complete physical evaluation, get a serum beta-hCG
titre estimation along with a trans-vaginal sonogram. This will rule out any pregnancy
or if present, confirm the gestational age
and the viability, so that you can take further precautions. If pregnancy is excluded, you should get further investigations including a complete hormonal
profile to know the cause of the absence of cycles and for further management. Hope this helps.