Depo injection

Hi I've been off the depo injection 7weeks we trying for my 2nd baby, I have a 4year old son.. Want to know how long it's taken for other woman to get pregnant when off the depo injection.. I know it can take upto 12months to get out of your system. It did take me 6months to get pregnant with my little boy after being off depo again.. So hoping my body acts like it did 5years ago and I've only got 4 more months of hoping in pregnant.