I think this is a little abnormal... my HCG is lowwer then it should be. Can you advise me?

My last period was on the 24th of August and here I am surely pregnant with a HCG level of 9432. How is that possible??? I should be about 2 and 1/2 months pregnant, yet my HCG level shows 6 to 7 weeks. So I'm abit confused with the results and my last period. And for sure my belly doesn't look 6 to 7 weeks pregnant. So I truely need some advice from the wise.