Getting Off Depo

I got 2 series of the Depo shot and had no bad side effects. My fiance decided he wanted to try for another baby. I have been off the Depo shot for about 3 months now and was wondering if there was a possibility that I could get pregnant that soon after being off the Depo. We want to be able to conceive a baby before Christmas time and was wondering if that was in any way possible.