Depo-Provera birth control shot – due for shot and chance of pregnancy

Question: Hi I went on the depo shot Jan 6 and not sure when I was suppose to get the 2nd shot I think the end of March beginning of April. I had sex on 3/24 and pulled out took a pregnancy test yesterday 4/7 and there is a very light line where the pregnancy line should be.. Was there a slim chance I could have gotten pregnant? He did pull out, but I know there is still that chance, should I wait a few days to test again to see if the line gets darker? I have 3 kids the youngest being only 8 months and freaking out, the whole point in going on the depo I thought I was protected even on that last week before the next was due. Any advice would be appreciated

Answer:  The Depo-Provera shot is effective for 12-13 weeks, but no birth control is 100% effective.  If your first shot was January 6, that means you would be due for the second shot around March 31, so you should have been protected on the March 24 intercourse.  Remember that stress, as well as beginning a new birth control method can affect the timing of your period.  If you would like to make an appointment to have a pregnancy test done in our clinic, please call 440-352-0608 (Painesville) or 440-992-5953 (Ashtabula).  If you are not pregnant, you should also make sure to get your next shot as soon as possible to prevent future unplanned pregnancies.  This can be done without an appointment if you come in during the clinic’s Supply Times which can be found on our website at http://www.fpaneo.org/supply-times/ or by calling the clinic you prefer.