Bowel movements now inconsistent for a while, lower left abdomen pain, frequent need to urinate. possibly low in fibre?

Abdominal pain: If you have significant abdominal pain you should talk to your doctor to find out the cause. Soluble fiber is always a good thing to add to your diet, will soften and regularize your bowel movements. If there is any pain/burning/urgency in your urination (not just drinking a lot and going more often), then you need to see the doc, a urine test to make sure there isn't an infection or inflammation!