See an Endocrinologist for a full evaluation. Our endocrine system impacts every major organ in our body, and if one thing is out of whack, it has a domino effect. Losing your hair is almost always a sign of thyroid problems. Don't have your GP do this, see an Endo. I wish you all the best and take care.
Have you had stool testing done? Do you know why the doctor did the bronchoscopy?