HCG levels?

Megan
I've read that HCG levels are not completely reliable in determining multiples, but they can be a small indicator. 
Anyway, my first beta 9dp5dt (14dpo) came back at 500 and my second at 12dp5dt (17dpo) came back at 2128.
From what I've read that's pretty high and I wanted to see if anyone had similar numbers and if they are carrying multiples.
Oh - and we transferred two embryos so it's definitely a possibility for us!