I get that feeling. Its the baby pushing thier feet up under ur ribs
I get this sometimes too. It's usually after dinner when I'm pretty full. Thinking sort of indigestion? Was this after lunch maybe?
Ive had this problem before. I just layed back on some pillows to where i was still sitting but there wasnt pressure on my rib cage. I drank lots of water and waited it out. When i talked to my doctor later he said it was just cramps from my body ajdusting and there wasnt much other then what i did to prevent them. But if u are concerned def notify ur doctor and he/she may be able to give u better advice.