I have a lot of pressure in my rectum, but when I try to use the bathroom, I only p green mucus/pus. ?

I am also ping stool that appears to be normal...it may have some mucus in it, but I do not believe I am constipated. I do not have any abdominal discomfort, or any other symptoms at all. I have been doing this for a couple of weeks. I do have lots of gas.