How am I not pregnant by now?

I got on depo Feb 2012 I got off of it November 2013 so a year and 9 months I was on it. I didn't get my first period until Nov 2014 it's been regular since, never late. In March I was in the hospital for a ruptured cyst (not sure if that has anything to do with it). We've been trying since March to get pregnant and I still haven't. Is there something wrong? It's making me nervous each month I get my period that I can't conceive and it's slowly breaking my heart. I know when I went to get my yearly pap in July they told me my cervix was downwards. Could that have something to do with it? Help!