A.P.
I've had similar pain in my right side just under my rib since near the beginning of my current pregnancy. I'm 33 weeks now. For me I can't sleep on my right side, the baby favors that side and if I lay on the left, gravity seems to help move him over a bit and the pain lessons, so for me I think it's muscular or skeletal, but that's right where the liver is, and kidney and gall bladder pain can show up there too, so def. don't ignore it. I've been worried the whole time, but no blood pressure issues that generally accompany pregnancy related liver diseases so doc's not worried. Since your baby is here, I would guess it's probably nothing, but if the pain is persistent, or severe like you've said, I would def. get a second opinion.