You have not had mensus for two months. Were you sexually active during these two months? If you were not sexually active then you can start taking Microgynon
right now. But you need to use additional contraception
like condom or diaphragm for the first seven days until Microgynon effect is established.
Since you did not have mensus for two months, the endometrial lining of uterus
must have become thick. It may cause irregular bleeding/spotting once you start pills. So I advise you to first take progesterone
to bring about Period bleeding and then start Microgynon.
If you were sexually active during those two months, then it is extremely important to rule out pregnancy
by blood pregnancy test. If negative, use progesterone for withdrawal bleeding and then start Microgynon from the first or second day of mensus.
I hope I have answered to your satisfaction.