Im currently 8 weeks and 2 days pregnant based off my lmp. i went in for a ultrasound last week and i was marked 7 weeks which is accurate but now im being told the baby is measuring 6 weeks but definitely is more developed than last week. help!!!?

There is imprecision with these early measurements and a very small difference can easily give you this much variation. Your LMP is least accurate and the test a week ago is less accurate than your current one. It is reassuring that everything else seems to be progressing normally, but the risk of miscarriage is always high until you get farther along and you have no control over that.