My Journey: TTC after 2nd Trimester miscarriage

My husband and I are TTC after loosing our son at 18 weeks in Aug. 2013. We have healed emotionally and have actively been trying again since May. Our first time around it took us 8 months, I'm nervous it won't happen-or worse will end the same way. My question is to ladies who have been through a similar ordeal, and have succeeded in a healthy full term pregnancy. How long did it take?