A.C.
The HCG level may be out of what is considered normal range BUT normal is different for every woman. At 7-8 weeks, the normal range is considered 7650-229,000...that is a huge deviation. Those ranges just mean that is where MOST women will fall...not ALL women. In the lower levels, it can mean pregnancy for one woman...and not for another. Also one HCG measurement in itself doesn't mean so much, it is how the hormone changes over time that is meaningful.
If you've heard a heartbeat...it isn't a Molar Pregnancy...though I wouldn't be so quick to rule out multiples. It isn't unheard of to not be able to hear the other heartbeat in the earliest weeks.