Ttc after miscarriage

So my fiancé and I lost our sweet bundle of joy last Monday. I started cramping a lot today. Like bad cramps. It just a reminder of the loss of our baby. :'(. anyways. How soon after can you try to conceive? Or are you more fertile after a miscarriage?! We want a baby so bad but I cannot go through this again. This has completely wrecked my world! :(