See the doctor but don't give up hope! I'm 34 and have a 5yo and had been trying on and off since October 2014 with no luck. I made the decision if I wasn't pregnant by this may I would go to the doctors. I started exercising more, eating more healthy and generally not stressing over it and I'm now pregnant! Sometimes it takes a while for your body to get over using birth control and the stress over it not happening can affect it. Good luck!
Just Pray about it and trust in GOD and everything will work itself out
Try Jamieson Prenatal Vitamin. It worked for me...in just 3 months