I Am Having Abdominal Tightness, Feels Like Braxton Hicks (although

I am having abdominal tightness, feels like Braxton Hicks (although I'm not pregnant) and abdominal distention. I get nauseated off and on and do not have an appetite. I was at the emergency room last night and they did a urinalysis, pelvic exam, and ultrasound. The only finding was that there was follicle on my right ovary. I thought I had food poisoning, which led to gastritis, and had an EGD for H. pylori, which was negative. A few days ago is when the symptoms of abdominal tightness with very frequent urination occurred. Bowel movements vary from constipated to diarrhea (IBD?). My menses stopped three months ago, shortly before I believed that I got food poisoning.