help pleaseee.

hi i had my first ultrasound at 6 weeks 6 days, the ultrasound person said it was too early to hear the heart beat but she noticed it and it was 142 bpm.
the crl was 8.22mm and the yolk sac measured at 2.57mm
is these measurements good or?
whats my risk of miscarriage im 11 weeks today.  

12 weeks is usually considered the safe zone.

There's really no way to determine how at risk you are, but congrats.

Quoting Millicent Elizabeth':" hi i had my first ultrasound at 6 weeks 6 days, the ultrasound person said it was too early to hear the ... [snip!] ... 8.22mm and the yolk sac measured at 2.57mm is these measurements good or? whats my risk of miscarriage im 11 weeks today.  "

Not sure about measurements but heartbeat is good  

Yeah, what she said....12 weeks is usually the safe zone. Measurments have nothing to do with whether or not you'll miscarry.