I ve been having nosebleeds approximately every second day, sometimes two or three times a day, for the past month. Only my left nostril bleeds, and when it does it lasts from 3 to 10 minutes. This has been accompanied by headaches and fatigue. I ve tried a humidifier, but it hasn t done anything to help with the nosebleeds. I m 17, female, and I have no allergies to anything. Any advice?