S.H.
You need to wait at least 6 months before trying again.
I too had a miscarriage at 6-weeks, and this is what my OB/GYN instructed to me.
Did you check with your doctor after you miscarried, that you "passed" everything out? I would get an exam first. With me, when I miscarried, it was over a span of about 3 days... I went to my doctor and it was occurring as I was there as well... as a matter of routine, I had a D & C... to totally clean out my uterus. Any tissue left behind "may" cause infection or whatnot.