Pre-baby sleeplessness

You always hear get your sleep before the baby comes but in reality I can't sleep, either because I'm too uncomfortable, or the 4 times I have to get up to go to the bathroom, or lately this miserable head cold that keeps me up. So I'm here venting about it.
Yesterday was a long day, I started having chest pains so of course the nurses tell you to go to the emergency room immediately. I honestly didn't think it was anything serious but might as well go just to be safe. And long story short (sort of) they said I should go to Andrews AFB emergency room instead of the hospital I've been going to for my prenatal care in Virginia because it was closer. Well Andrews doesn't have a labor and delivery unit so they ended up transporting me to another hospital anyway. And I was frustrated because we should've gone to the hospital I've been going to in the first place because they already had my information and who knows but I think the testing may have gone faster too. And after 7 hours of testing, poking, prodding, and monitoring they finally discharged me with all major things ruled out. So we're still just waiting for the baby to come.
One thing I did find kinda cool was they did an ultra sound to monitor the baby and they said he was 6 lbs. 10 oz. I don't know how they determine that but now I'm interested after he's born to see how accurate those estimates are. Definitely small than Harrison, he was 8.4, and his delivery was really quick so again I'm curious how quick a delivery it will be with a smaller baby. They also took some pictures of his face and he looks a lot like Harrison did when he was born. Although I'm really nervous for 2 kids I'm excited to meet this little guy soon.