Ive always had a fast metabolism. Yet within the last 5 years ive been expereincing extreme acid reflix and extreme pressure.it had gotten worst with abominal and muscular pain within all of my stomach and ribcage filled with pressure with extreme belching. Prilosec helped but not completely which i took for 6 months. my stools change sometimes it feels stuck in my stomach or its green and cant wait to get out. I feel naseau or vomit. im worried it can be polyps or cancerous or maybe be an infection. a few times, i have fely like i truely was about to burst or die, like contracting muscles and pressure. sometimes it keeps me up with shortness of breath or feeling light headed. i also just had a baby 10 months ago.