I Have Lower Abdominal Discomfort - When I Change Position

I have lower abdominal discomfort - when I change position I feel a heaviness in my rectum and lower abdominal area. I also have back pain on the left side about a hand's width above the hip. This started Saturday afternoon. I took a stool softener on Saturday evening thinking I might be constipated but I had several bowel movements on Sunday. Believe I ran a low grade fever Sunday night into Monday. Feel there is a lot of gas and the lower abdominal area is bloated. Previous diagnosed with Diverticulitis Have been on liquid diet since midday Sunday. Primarily water but small amounts of applesauce. Primary care doctor is out of town this week. Not sure how to proceed.