I have a huge question that needs to be answered. I have been having lower abdominal pain on my left side and it hurts literly my whole left side of my body, including my rib cage internal, my internal organs feel kinda bubbly. I am 19 years old with a 3 year old child and my heart and left breast has been hurting lately more and more each day and I am gaining weight but only in my stomache, I feel bloated and can hardly swallow some days. I am a very petite girl I weigh 120 5'8 normally but i weigh 135 now . What might be wrong?