I always have normal vital signs, i don't have a fever, but i always feel tired, any ideas why? i went to er but they only did a urine test.

Fatigue: An emergency room is the wrong location for an evaluation of this. You need to establish a working relationship with a primary care physician and stick with them. "tiredness" is a vague symptom with numerous possible causes, and before even speculating about possibilities would need a detailed history and physical exam along with basic lab studies.