Yes, both thinning and having clumps of it falling out! There is a stress related condition that has a name...
I googled it and didn't find the right name, but I did find this:
Hair loss caused by severe emotional stress
Some people experience Telogen Effluvium or sudden diffuse hair loss after a traumatic event such as the death of a family member or someone close, an accident, abuse or any other severely traumatic event. These events may trigger hair follicles to enter the resting phase prematurely in which case an increase in the amount of hair shed will be noticed about 3 months after the event, as the hair makes a transition from the
The above types to sudden hair loss are usually temporary an in most cases hair will grow back normally soon after it has fallen out. However in some cases where diffuse and sudden hair loss occurs the hair loss may continue until the underlying cause is treated. Types of sudden diffuse hair loss that continues until the cause is treated are as follows:
Thyroid Gland Malfunction
Diabetes
Anaemia
Systemic Lupus Erythematosis
Hair loss that is cause by the above underlying causes will usually continue until the underlying cause is treated.