At my ob appointment on Tuesday I was measuring 22 weeks. Both heartbeats were strong; they just used a doppler to hear them so I don't know how fast they were. I saw the other doctor in my practice and he informed me that Baby A has a low-lying placenta (basically, it's just that- low and close to my cervix). They are hopeful that as the weeks progress the placenta moves away from my cervix a bit, which I guess is somewhat normal. They'll keep an eye on it so placenta previa doesn't become an issue for me.
So here I am at 18 weeks: