I've had the same problem since I was about 15 weeks.am 30 now and the doctor said its caused by the nerves under your ribcage getting pinched from everything moving up(organs/baby etc.) Mine has only gotten worse at the weeks go by :/
You can feel baby kick in ur ribs. I am on baby number 5 am 18 weeks and def feel high kicks... People think the uterus and sack are a ball shape.. It move and stratches with baby. You'll prob find you get there kicks when sitting down.
I've been having a lot of rib pain for the last few weeks, started around 18weeks too. Not sure if there's much I can do about it :(
It gets really bad when I sneeze which happen quite often.
They have full range In your belly and your ribs. People can start feeling movement at 18weeks.
My baby has been completely stretched out and I can feel his kicks in my ribs. Since 18wks and now I'm 24
Dont think it could possibly be your baby. The baby is finally up to your belly button when you reach 20 weeks so i doubt your baby would be anywhere near there..
Your at the stage now where it very well could be the baby. But small pains in your ribs will be a common symptom you'll experience the whole pregnancy.