Depo Shot/ Can I get Pregnant/pregnancy test?

Gabrielle

So me and my SO had a little miscommunication the other night and he cummed in me.. I've been updated with all my shots and have been for a long time! and we haven't taken the plan b yet.. I don't know if it is possible I know that the depo has a low failure rate but just want to hear from you guys!

I want to take a pregnancy test but since I'm on the depo I don't have periods when should I take it?