sorry, just re-read my response and it seems a little heartless. it wasn't meant that way. i got pregnant easily, but both times my pregnancies were hell on earth.
like i said, if it doesn't happen immediately, relax and try to take your mind off of it. it would be very difficult, i'm sure.
i do wish you the best of luck.
ps. you don't say how long a "little while" is... or how long it took you the first time.