Hi I had the depo shot once in sept 2015 I didn't go back Nov 2015 I never had a period just spotting different days I had unprotected sex before during and after shot could I be pregnant ?

Yes, you can become pregnant before seeing a return to regular periods. Use another form of birth control to lessen the chance of pregnancy if you are wanting to avoid a pregnancy.

If trying to become pregnant, continue with unprotected sex and you may want to try a pregnancy test once a month unless periods return, then you can more easily start checking for signs of likely ovulation.