I have had recurring suspected acid reflux and ulcer symptoms over the course of a year. I am having another episode and am extremely nauseous, have slowed bowel movements, acid reflux and pain above the belly button. My doctor suspects an ulcer flaring up and has given me nexium to treat. I will see her in a week. Nexium is not having much effect. What is a differential diagnosis and what test can I have to deny or confirm ulcers? Is it possible to have multiple ulcers? I also suffer from tremors and am not on any medication except for nexium. By the way- I am a 32 year old female, I am 5/7 and weigh 110 lbs. I have lost 8 lbs in the past 2 months.Though I have always been thin, the weight loss is a concern of mine.