"hypo" or "hyper" thyroid both can cause hair loss. I experienced hair loss with "hyper" thyroid... I am on synthroid and had too high of a dose. That is totally diagnosed with a blood test. Do you have an enlarged thyroid? Is it hard to swallow or do you suffer with frequent sore throats? Are you skin, nails and eyes dry frequently? These are also symptoms of thyroid problems.

All this being said, there is a direct link between hair loss and stress. Look up the term "alopecia" (not sure about the spelling). Lots of women that have hair loss, usually total hair loss, are diagnosed with this condition and it is said to be linked to phycological problems such as stress.

I'd go see my physician soon, just to illiminate the worry of... "do I have a disease?"

Hope it's nothing!
Kim