I just got the drop shot yesterday, I'm NOT looking to get pregnant. But my question is once the depo has been given and let's say its been approximately a month and my s.o decide to have sex can he cum IN me and I won't get pregnant? Its just curiosity.
The depo-provera is supposed to work immediately IF administered within the first seven days of your menstrual period otherwise you must use a secondary form or protection like condoms, diaphragm, etc. Now keep in mind that even the depo shot is not 100%, anytime you have sex there is a chance of pregnancy. Check out planned parenthood (in the link) or go talk to your nurse/gyno for more info.
Ask your gyno to make sure.