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Your symptoms (pain in abdomen,constipation, morning sickness, vomiting) could be due to inflammatory bowel condition such as ulcerative colitis, Crohn’s disease, Celiac disease (gluten intolerance), lactose intolerance or IBS or irritable bowel syndrome. Along with any of these there could be associated acidity, gastric reflux or hiatal hernia.

Crohn’s disease also causes other symptoms such as arthritis or painful joints, which you have. Inflammatory bowel disease along with acidity can cause sleep problems and headaches. Acidity often causes early morning sickness as the stomach is empty then and eating starts a vomit reflex as the stomach lining is irritated.

Omeprazole is a good drug to combat this. Along with it you can try over the counter antacids. However you are recommend to consult a doctor and take medication under a doctor’s supervision. Avoid heavy meals and eat frequent small meals. Avoid too much of caffeine, tea, fried food and drinks both alcoholic and non alcoholic fuzzy ones. Avoid heavy exercises within 4 hours of a heavy meal. Raise the head end of the bed by pillows to 30 degrees. Go to bet at least 2 hours after food. Maybe these tips will help you.

You should see a gastroenterologist (a specialist who looks after the diseases of our digestive system) or a physician for this if these tips reduce your symptoms. It is difficult to comment beyond this on net. Discuss these possibilities with your doctor. Hope this helps. Take care!