TTC after birth control

Hey, ladies. I started Depo-Provera in September, and my boyfriend and I decided to have a baby. I was supposed to get my second shot in November but I didn’t. During the 3 months on Depo, I didn’t have a period at all. I started cramping and I’m finally on my first period after stopping Depo.

I only took one shot of Depo-Provera. How long before I start ovulating again?