I Have Had Extreme Stomach Pain On My Right Side

I have had extreme stomach pain on my right side into the middle of my stomach for a few weeks. I've had tests and ultrasounds done but everythin has been coming back normal. I am extremely light headed, I have been spitting up a lot of very thick mucus, Ive been peeing about every 15 minutes on average and not drinking much, I have multiple bowel movements a day, and when I eat it aggravates my stomach more and I poop it out within 30 minutes of eating. I have an appt with a GI Dr but the pain is becoming so much and the symptoms are accumulating so much that I'm really getting worried. I have also been very gassy.