How Can I Bring Back My Periods After Quitting Petogen, Which I Used For Two Years And Caused Me To Miss My Periods?

Hi doctor I ve been using Petogen for full 2years now and during the process I haven t been on my periods . On the 3rd of Jan was suppose to go to clinic it was my date but decided to quit it because of my menstruation circle. How do I bring my periods what should I do or use to be normal again?