Yes, you should have a talk with a good doctor about your case. I can suggest you to try some natural remedies:
1) Cut back on meat: Hormonal imbalances are a primary culprit in hair loss. Japanese researchers also link excessive sebum production in the scalp to high levels of 5-alpha reductase. Their research indicated that animal fat intake may increase sebum production.
2) Address a possible underactive thyroid gland (hypothyroidism) which can cause thinning hair: Add sea vegetables like kelp, nori, dulse, kombu and wakame, all of which are rich in iodine may be helpful to balance this condition. Avoid drinking tap water since it typically contains fluorine and chlorine, two chemicals that inhibit iodine absorption. You may also want to supplement with 100 mg or 1 mL of the herb bladderwrack (focus vesiculosus) daily. Work with a qualified holistic health care professional if you suspect a sluggish thyroid gland.
3) Get enough essential fatty acids: Essential fatty acids from walnuts, flaxseeds, fish and avocado are also important for healthy hair.
4) Boost bioton: Biotin encourages hair and scalp health. Dietary sources of biotin include: nuts, brown rice and oats.
Also I can suggest you to try TRX2, it's totally natural ingredients, it helps with my hair loss problem, but you first have to discuss it with a healthcare professional, because you're only 15.