Wait for one week for periods to start. If it doesn't start in a week, take tab. Deviry 10mg twice daily for 5 days. Wait for another 2 weeks for periods to resume.
Review your recent usg report. Need to see if it's polycystic ovary or endometriotic cyst of ovary or a simple benign cyst.
Menstrual irregularities maybe because of this cyst or maybe because of hormonal imbalance.
Kindly consult for further opinion.
Next Steps
wait for 1 week for periods to resume on their own.
if no periods,then start deviry as mentioned.