You got pregnant a week after your
miscarriage?
Ok, generally if you cramp but have no
bleeding you should be fine, remember that
the ligaments around your uterus are
expanding quite rapidly now so aches are
totally natural, I'm a little further
along than you are but had cramping from
around 10 weeks and it's nothing to worry
about.
If you are very concerned see your doc and
ask her to explain, they will understand
your fears so don't be afraid to ask.
Best of luck