Can I still get pregnant?

So I got pregnant in 2011 but I had a miscarriage when I was 6 weeks. Then in 2012 I was on birth control till November 2014 I been off from BC since then but I have not gotten pregnant. Makes me think I can't get pregnant anymore. 
The first time I tried it ONCE and got pregnant without even knowing anything about being fertile or ovulating (just had unprotected sex and got pregnant) but now it's just not happening. I'm scared that I'm not able to have babies anymore then then I try to think that maybe because I was on BC for 2 years maybe that's why it's a lil harder (I was never on BC before 2011)
What do you girls think!?!?