question: Hello,I have had lower abdomen pain off and on for about two weeks.  I have not felt sick to my stomach.  The last two nights I awoke and had to vomit.  I have a history of UTIs and took a home test today and the leukocytes were positive but negative for nitrates.   I do not have a fever but I am very tired.  I am a 48 year old female and had my gallbladder removed ten months ago. I weigh 150 lbs and am 5ft 3in.   Thank you. Jen.