hoping for another baby but not seeing any light at the end of the tunnel

I had my son January 2012 and got the mirena birth control at my 6 week checkup. I had it for a year and got it out in January 2013. My husband and I don't use any birth control or protection. I don't have a regular period but get 1 about every other month or so. I'm pretty sure I'm still ovulating because I get the discharge every month. Neither of us have been told we can't have children either. Any ideas or suggestions are welcome.