I have had recurring lower back pain for about 2weeks. I initially experienced it when I slept in a bed away from home so assumed it was just the bed. However, since then, the symptoms have continued, initially fairly constant so took Advil and applied heat....with some relief. However, the discomfort does not feel like the typical muscle spasms I have experienced in the past. At times, it seems more pronounced on the left side. At times, it disappears all together. But it recurs at nite after I have bee sleeping for a few hours and it is difficult to find a comfortable position. Abdominal discomfort accompanies it at times as does a boating feeling. I also feel more tired than usual.