Pain on right rib

I'm 22 weeks. For the last few weeks I have been getting a pain at my right rib, just below my boob. It's mostly after I eat but not always. It gets really sore and uncomfortable. Lying down for a little while is the only thing that eases it. Is it just from everything in my abdomen being pushed upwards? Has anyone else experienced this? I'm worried it's going to only get worse. Any advice which might ease/help?