I am sorry you're going through this.
At 10 weeks there will be a fetus and a heart beat. The same thing happened to me. I went to my 12 week scan and the sack was present, but no fetus or heartbeat.
I was shocked that I haven't miscarried the pregnancy like most women do, so I thought all was going smoothly, so it was a real shock and incredibly heartbreaking. I was angry with my body for not warning me by experiencing the bleeding, at least then I would of known that I was losing the pregnancy.
It seems to me that it's likely that you're having a missed miscarriage. Click on link below.
You can also Google misses miscarriage for more information. You will be given option to start of the miscarriage such as taking some forms of pills to kick start of the miscarriage or you can have a operation called the D&C.
You will most likely be scanned again just as a routine check but you would definitely have a fetus inside the sac with a heart beat at 10 weeks.
I know it's hard and am very sorry but going through this. X