I am 5 weeks pregnant and in China. It's hard for me to communicate clear with the doctors.
I saw on the ultra sound... that there are 2 circles in the bag...

Can they be 2... and see it at 5-6 weeks ? :)

At 5-6 weeks it would be too early to tell. Your doctor is going to be looking for a heartbeat soon. If there are 2 heartbeats, it is twins. However, the heartbeat won't likely be seen until around week 9 or 10.