Hi, I was having severe generalized abdominal pain yesterday, including nausea, chills, hot flashes, and some lower back pain. No trouble using the bathroom or anything like that. The pain has since subsided, but there is still kind of a full feeling, and a little abdomen pain if I stretch. I am a 19 year old relatively healthy female. I didn t take any antacids or anything for it, but I did use a hot pack which helped with the pain.