Back to the Doctor again today (yes, we've seen enough doctors in the last two weeks to choke a horse) and everything is great with the twins. The Doctor was able to find their heartbeats without problem (one was 170 and the other was 140 BPM). The stress and exhaustion of Peter's accident had no impact on the babies. Per the doctor 'they are parasites that take what they need... it's the [mother] that suffers'
We scheduled another sonogram on October 23 to measure and check both the babies, and yes, find out what the sex will be.