BW - do you have a ertain age gap that you are aiming for? If not then I would just relax and wait, the urge to have another baby will come. For us it was 3 yrs after DS was born that I wanted to have another baby he was 4 when we actually decided to ttc. After I had my DD I would have gone back the next day to have another, different pregnancy differnt baby.

If you aren't on any time constraints then I would sit back and enjoy your gorgeous little boy now while he is still little.