See my post on this forum to another victim of hair loss it details hoe my daughter overcame hairloss (30-60 minute walks at around dawn (perfect in hawaii!!) 50-100mg pd of 5htp, foods high in tryptophan (google for a list), yoga, meditation & relaxation.
Also ginseng hair tonic is good for hair problems and general hair health & you can also get ginseng shampoo & conditioner - the tonic apparently (i know a couple of people who have used it & found this) helps "thicken" hair.
But it does seem as if your system(like my dauhghter's last year) has just gone into overload & you need to relax, destress & then things will start to heal.