I don't want to be alarmist, but I had a little pain like this a while ago, with swelling hands and feet...thankfully for me it was just over doing things but....

Do you have swollen feet hands and/or face? Any nausia, headaches, high blood pressure? I was told that any pain in your upper tummy could indicate pre eclampsia. If you have any other symptoms or even if your'e just not too sure, call or go to the dr as this can be serious.
I hope it is nothing for you too like it was for me, take thing easy for a few days. I hope you feel better soon.