For the last few weeks I have been having mild pain under my rib cage on the right side. Today I have been feeling really nauseated, and have a bad headache. I started pushing on the area that hurts, under my ribcage, and found that it is REALLY tender to touch it. It hurts when I push on it, and has made the dull aching worse. I suspect gallbladder because it runs in the family, and this happened to my mom. The only thing is, a few months ago, I went to the ER with pretty severe pain under right ribcage. They did an ultrasound and said it looked "normal". I don't know what to think, or if I should see a doctor?