It can take 6 months to a year for it to fully leave your
system. As your body adjusts to not having it in your
system, you can also have many odd side effects. Symptoms in general are unreliable in terms of determining pregnancy, as desire to be (which I'm assuming you're hoping you are), fear of pregnancy or some other health problem can cause them. If you think you are, take a pregnancy test with first morning urine.