What should I do next if I've been experiencing thinning hair over 2 years? (photo)

There is difference between hair thinning and hair fall. If you noticed hair gradually thinning over months or years, female pattern hair loss is the most likely diagnosis. If however, there is an increase in the hair fall of >100 strands, that is significant and there are a number of conditions that can cause this and this often warrants further investigation to look for the underlying cause. Dermatologists specialize in the treatment of skin and hair diseases and you can consider seeing a dermatologist for your concerns.

From your description, it does sound like you may have telogen effluvium. In telogen effluvium, there is increased hair loss due to a preceding stressful event, such as high fever, crash dieting and emotional stress. The surgery in June may be a triggering event. By definition, hair fall is considered abnormal if there is loss of over 100 strands of hair a day. This condition is usually self limiting and the hair fall usually last for 2 – 4 months . The new hairs will eventually grow out.