My gyn told me that if you do not have a cycle for 3 months you need to go in to see if nothing is wrong. They will do some blood work to see if
a) pregnant or not
b) test your thyroid
c) check prolactin levels
d) check pituitary gland (controls your estrogen and progesten)
if all these come back fine they may put you on somethig called provera (sounds familiar right not depo though) this will reset your system and force you to have a period. If that works then you should be on your way to regulating... I am finaly gettting there.. Almost regluar now. Only about 5 days off each time. Hopefuly now my husband and I can start trying to have a family.
Good luck.