Waiting for results of FIT test.

I'm in total bits waiting for the results. Can't sleep, have to use sleeping pills. I had three doctors who examined me who said they couldn't feel anything wrong in my stomach. They said my upper right sided pain was acute stress. It comes and goes. The last doctor said what are you concerned about, I said cancer, he said he couldn't find anything wrong, but if you want a FIT test I'll do one for you. My bowel movements are very dark brown. I have constipation because of tablets I'm taking to slow my heart down. I used to have really bad pain in my bowel at night but it seems to have gone. I'm not asking anyone to diagnose, I just don't have anyone to talk to. 

Sorry if this is graphic or if I said stuff which is not allowed. 

I just don't know if I can handle hearing that they've found blood in my stool. 

Thank you.