It really just means that you are not very animated in your facial expressions, voice tone, and body language. It means that no matter what you are told or what happens to you, you respond the same way outerly, with your body language showing no real change. It also usually means that your voice is monotone, or flat. Physical expression of your emotions are minimal to none.
On average, via Ultrasound, they should be able to detect a heartbeat around 6-7 weeks. However for some women it can be up till 10 weeks. The range of the heartbeat that they feel is good is 120-170 or there about. I hope you are doing well.
Hearing your baby's heartbeat for the first time can be deeply moving. Keep in mind that a baby's heartbeat is much faster than an adult's. If you're in your first trimester and you can't hear your baby's heartbeat, don't worry. Dopplers can't reliably detect a baby's heartbeat until 10 to 12 weeks. Your doctor may try again on your next visit.