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.
Fetal development is monitored closely throughout the pregnancy to ensure that everything is progressing well. Ultrasounds are performed between 5 and 9 weeks, and at 20 weeks to assess growth and fetal heart sounds are detected at most visits to insure that the pregnancy is viable. The fetal heart begins beating at about 5 weeks and can be detected by transvaginal ultrasound shortly after this.