Hcg levels indicating twins?

Melissa • I am married to a wonderful man and a mom of 2 kids a handsome 5 year old boy and a 2 month old baby girl.
Hi ladies, 
I had some bleeding for a few days and then it was gone. So my doctor had me go in for a hcg blood test and it came back 226 which confirmed I am pregnant. Then yesterday she had me go in again to make sure it wasn't decreasing and it increased to 913. Does that indicate twins?