Stop taking regesterone first because it's a hormone n it just induces menstruation without ovulation. Get a basic USG done. If u have gained weight that can also impact periods. Loose ur weight though it's easier said than done. I think ur r unmarried, take regesterone only if periods don't come for 3 months. U would need treatment for ovulation but it's needed after marriage.

If u reduce atleast 5-10% of ur present weight, improve blood pressure control, regular exercise can improve your cycles in3 months