My doctor said i don't have an infection in my fallopian tube but what is causing it to be inflamed?

Tubal inflammation: How do you know your tubes are "inflammed"? The only way to tell that is to have a surgical laparoscopy done. There are many causes for lower abdominal/pelvic pain. These causes can be from your tubes/ovaries, intestines, bladder, abdominal wall/pelvic musculature, etc. It's good that you don't have an infection, as this could affect your fertility.