I av been in depo injection for the past 4yrs it finish this may and I have my first period in September am TTC now for the past 3 months no result yet I see my Doc she put me on Vitafol Ultra caps. So I really don't know how long It Takes for me because am having problem with my husband that I don't what to get pregnant. I really don't know what to do next. My period usually come within 28 days but this month is earlier 23 days why the sudden change.