Loosing my hair?plz help.....?

Hair loss can be caused by a number of problems. Exposure to some kind of chemical including pollution. A scalp or hair follicle infection, thyroid problems, medication, allergy to certain hair products. At your age, you should really go to a doctor to find out what he/she has to say. I'm sure that you will have some lab work done which can at least eliminate some of the possible problem and get you closer to a solution.