Early sonogram shows what could be multiple sacs?!?!?

So I found out I am expecting...I began to have alot of pain and was sent to the ER their they attempted to rule out an ectopic but didn't see anything on the sonogram and my HcG levels were low, they assumed I must be to early to see anything so I went back to my dr the next day and upon doing the sono he saw what looked to be 3 sacs, he said he couldnt be sure they were going to have babies in them, or that i would have mulitples, he told me waiting was all we could do...well my HcG levels rose so that was a plus but now I am wondering...could it be more than one?!?!?! I am so lost with this...anyone else had this happen please share!