Blood in Stool after Gallbladder Removal

I had my gallbladder removed on January 4, 2011. My gallbladder was fine, but the duct was so narrow nothing was passing through. The first week everything was fine. Then on Sunday I developed a low grade fever, insomnia, diareeha, pain at bottom of chest bone and extreme pain under right ribs. The diareeha stopped, but my stool then became bloody. Not the bright red in the bowl like hemmoroids, but the actual stool seemed to be formed from the blood. One time it was black and looked like charcoal, then it was a maroonish/brownish, like the last few days of the menstraul cycle. I went 3 whole days without being able to sleep. I finally went to the ER b/c I thought I had internal bleeding. They were so packed all they did was a chest x-ray. Will a simple chest x-ray show an internal bleed? I'm 2 weeks now post surgery and still running a low-grade fever, no appetite, very tired, can't seem to get warm and still not sleeping. Please Help