Unusual frequent urination

I am a twenty-year old man who is having depression. I saw that I move to the toilet very frequently; I then thought that I have diabetes because depression and diabetes may accompany each other. My examination results were pretty good and indicates that I do not have diabetes-thanks for God! The question I am asking myself these wis what issue I am suffering from that causes me to undergo frequent urination. You know, for a depressed person, evern such a question would irritate me much and would make me feel overwhelmed! The physicians here in Saudi Arabia are poor when they come to diagnose; if the problem is already known, then determining the treatment is not a big deal. What do you recommend? What are the possible problems witt me? Are there any recommended examinations you may mention?