I got my medical records from the ultrasound and it says I do, indeed, have a bicornuate uterus. Further, it also says they could not find my left ovary. It is inconclusive about whether I have a left ovary or whether it was just hiding really well.
After doing a little more research on this I'm a little shocked and sad. According to
this site, only 0.1-0.5% of women are known to have a bicornuate uterus (though the actual number is likely higher because it's not something you would know unless it was causing trouble so women who have never had a baby likely wouldn't have any idea they have this). It says there is an estimated 55-63% fetal survival rate associated with this. It also says there is a 15-25% rate of preterm delivery. It says fetal growth retardation is also associated, but more likely the baby wouldn't survive that long or would be delivered preterm. It also mentions that often babies, especially if they aren't preterm, can't get into a proper birthing position because there's not enough room (so they won't go head down).

However, it really makes me see how much of a miracle my ds is. He was born full term (we evicted him at 39 weeks

), vaginally, AND he was big (8lb 14oz). So I know it is possible to have a healthy, full term baby. But if we try again are we playing with fire? What are the odds of having 2 healthy, full term babies?
Throw in the possibility of not having 1 of my ovaries and.... huh. Makes me really appreciate the miracle of my ds being here (ds was an "oops" the first time I ever had sex without protection).