I asked a fellow member here what her experience was coming off Depo. This is what she said:
There's a lot of ways I can offer you advice. First is, you have to start charting. You say you have 17 day cycles but are they ovulatory or annovulatory? It could just be withdrawal bleeding from the exogenous progesterone (the depo) still lingering. The only way to know if you are ovulating is to chart. Learn about cervical position, mucus and basal body temperature. You have to commit to this and you can't just do it for a month and expect to know your cycle, it takes a pattern. Further, I told my doctor I was doing this and noticed I ovulated later than most. He was checking my post ov progesterone too early, so because of my charting, he pushed back that blood work and we were able to more effectively monitor my post ov progesterone. Also look into SMEP and discuss that with your partner, it takes 2 to make a baby and your partner must be equally committed!
Good luck!