When I take a deep breath, it hurts on my left and right sides in front on my waistline. It has been 4 days. I thought possibly I needed a bowel movement so I took Delcolax. After bowel movement, nothing changed. The pain is a little worse laying in bed and I wake up a couple of times during the night. It hasn't gotten better or worse in the 4 days. I'm worried that it might be cancer.