You wrote:

"i am 21 weeks pregnant with my second child. i have had all my prenatal care visits without any complications thus far. my doctor says i am gaining wt normally and all my blood work is normal and my vital signs have remained within normal limits. but i keep having quite a bit of pain under my right rib cage that is almost constant. i've informed my doctor several times but they state everythings ok and all my labs are normal....but they never give any reason why i am having this pain. the only thing that relieves it sometimes is lying down."


Pain under your right ribcage probably has nothing to do with the pregnancy but, perhaps, is related to a gallbladder disorder (stones for example). You can request an abdominal ultrasound to exclude gallstones as a reason for those pains and to possibly diagnose any other cause for the discomfort. You can go to your primary physician to follow up.