Hi Bok, i had really sore ribs at about 13-16 weeks, before i started putting on weight, but it got better. Now at 23 weeks my ribs are sore again, but it is most uncomfortable if I'm lying down, and I think it's related to the weight of the bump. I've heard about special body pillows and wedge shaped pillows to prop up the bump, so if you think it could be weight related, that might help. Good luck!