It takes at least three months from the time of the injection for the hormones to get out of your system. After that, it's a matter of how long it takes your body to regulate itself. Make sure not to have sex daily but rather every other day so his sperm count can be at good levels each time. It can take months no matter what, and there are currently no links between difficulty becoming pregnant and hormonal contraceptives.
Good luck!
Oh ok thanks the month of July I had miss a period then the month of August it came back.