she is on the depo and I wore I wore a condom, pregnant?

Hi,
Welcome to ehealthforum.
Chances of pregnancy are possible due to contraceptive failure. If she has not taken the Depo shot on time, or has been sexually active during first 1-2 weeks of taking the shot, pregnancy chances are possible as the Depo shot starts giving effective protection after 2-3 weeks. Condoms are also associated with failures. If pre-cum or semen has come in contact with vagina during her fertile days, chances of pregnancy are possible. Consider checking her probable conception date to have an idea if you are the father of the child. The exact results can only be made out after a Paternity test. Visit her doctor/gynecologist for further clarification and assistance.
Take care.