Medroxyprogesterone

I was bleeding for 3 months straight and my obgyn put me on medroxyprogesterone to make it stop.  I started it the day before I was predicted to ovulated.  I have been off it over a week and was told when I stopped I should spot and then my period should come normally.  I have been having unprotected sex and I am 3 days late on my period.  I have no clue what is going on.  My questions is has anyone taken this and had this problem?

[Dr Santos]

Hi,
How are you? Delay in your period may be due to hormone changes brought about by discontinuing the medroxyprogesterone. Regular periods may start when the hormone levels go back to normal. Factors such as a the length of prescription, medical history, presence of illness or stress may also be important considerations.  However, if there is history of unprotected sexual contact and ovulation is not sure, it is best that you check with a pregnancy test to rule this out. Take care and do keep us posted.