I'm new to all of this, but from what I have read that sounds like it may be crohns symptoms. When I first got diagnosed thats what I went to the hospital for was loose stools with blood in them, but there was a lot of blood. Then when I got to the hospital the blood wasn't there anymore. The doctor said she ruled out crohns, but they did a colonoscopy and a stomach scope. The biopsy come back early stages crohns disease. From then Ive been really sick. My bloodwork, stool samples, ultra sound, and other tests come back negative for crohns. When I found a good GI come to find out they think that I've had it for a while now. So I would request further tests If I was you. I had an endoscopy which is where you swallow a camera and wear a device for eight hours and it takes thousands of pictures of your stomach, also an xray of my small bowel.