help.

I took my first depo shot on December of 2015 and then took my second one late on April 2016 and I haven't had one since. That was the last birth control method I've had. That was 7 months ago and I still feel like it's in my system. I've had unprotected sex and my boyfriend has got off in me every time we have had sex since I was off the depo shot and I'm still not pregnant. Not to mention we have sex a few times a week. How long is it going to take me to get back to normal and it be easy for me to get pregnant? I've heard you have to be off of the depo shot for atleast a year for your chances to go back to normal. Is that true? I'm just ready in my life to make that next step and I feel like it's never going to happen. What can I do to increase my chances? Should I just keep doing what I'm doing?