Hello. As you know, Primolut is a progesterone-like hormone that disrupts your normal menstrual pattern. The period that follows a course of Primolut can vary quite a bit, depending on where you are in your cycle when you take the medication and how long you use it. Additional variables, such as stress
, exercise or other medications, can also influence your menstrual flow. Thus, every period that follows a course of Primolut won't necessarily be the same.
If you had unprotected intercourse
around the middle of your last cycle, it would be prudent to take a pregnancy
test, as pregnancy would obviously alter your pattern of menstrual bleeding, too. (Many women experience vaginal bleeding during the first few weeks of pregnancy; about half of women who experience early bleeding go on to have miscarriages.)
If you're not pregnant, your usual menstrual pattern should resume within a cycle or two: your upcoming cycle should be roughly the same length as your normal cycles. If your pregnancy test is positive, see your OB/GYN to begin prenatal care