I have experienced this too. This is my second pregnancy and i have felt this dull pain both times. I am currently 31weeks and after eating I experience the pain beneath my rib cage to the left of my body. Last time I was pregnant, I asked a nurse about it and she said that it will be my diaphragm aching as my organs are being pushed upwards. This makes sense as it occurs after eating and later onijn pregnancy when the bump is getting bigger. All I can suggest is small portions of food. Sitting leaning back helps but not a good idea for encouraging a good fetal postion (can increase chances of a back to back labour....not nice in my experience). Best of luck xx
Could definitely be babies feet. Although of you try to press on babies feet they typically will respond in some manner. If you're concerned contact your doctor.