Are these two problems related?

In November I went through a lot of stress that caused me physical illness. The stress is gone now, and I feel very happy and emotionally stable, yet I still feel pain. Most of the time when I go to the restroom and have to poo it's diarrhea, not solid. Sorry if that's too much information, I just figured that I should include all of the symptoms. Anyways, I don't have an appetite most of the time, and I have random sharp pains in my abdomen, mostly behind my right ribcage. I can actually touch a part of my ribs and feel discomfort and pain. I also get nauseous after eating and every morning when I wake up. So my questions are...does my nausea have to do with the pain behind my ribs? And what could be causing this?? I appreciate your help.