Hi J.,
You sound like me. I posted this a few months ago and didn't really get responses except for someone who said it was stress and another who wanted to help me with more natural products. I had the same exact thing happen after going off the pill. However, at first I thought it was in my head. After many months, and losing a ton of hair, I saw a dermatologist who said it was a hormonal imbalance. However, I know I already have hypothyroidism...had it for the last 8 years or so. So, now I have been seeing an endocrinologist to monitor my thyroid. On a side note, my scalp itches me like mad and it quite dry. Don't know if your is the same.
Anyway, the endo said that while my regular internist said my thyroid is in the "normal" range, there is a huge normal range. And, mine was quite low and getting lower (while still in the normal range). Most people do well in the middle of the "normal" range. He ran tons of blood tests on me (to make sure I wasn't producing too little estrogen/too much testosterone, iron deficiency, etc). All these things can also cause hair loss. Anyway, he has kicked up my throid medicine and I go for a re-test tomorrow. I am still losing lots of hair though. But, I've only been on the new doseage for a month or so. I've been having this hair loss for 10 months or so and for me, I feel like I waited too long before getting this checked out. I now have quite a bit of thinning in areas.
Bottom line, you could have a thyroid issue as well. I would get it checked out.