Mama, please call your OB or go to the nearest clinic/hospital today to get checked, upper abdominal pain in pregnancy needs to be looked at properly, lalo na if it's persistent. Better safe than sorry, lalo na sa second trimester. A few of us moms felt different types of discomfort during pregnancy, pero hindi kami makakapag-advice kung ano talaga yan, your doctor needs to see you. Sending you love, kami nandito if you need to vent after your checkup!