BAM,
I have my hair coloured professionally so I am not sure about hair loss as a result of home colouring. I like to call myself a natural salon blonde. That said, I started noticing hair loss last year and attributed it to stress as I was doing a lot (work, school, family, volunteering, workouts etc..).
As it turns out - it was not stress related but due to perimenopause then full blown menopause. I tried everything and nothing really stopped the hair fall (that was stressful). No one really noticed but my hair was gradually thinning. My doctor was no help. Heck, she referred me to a dermatologist. In the end, I took a referral to someone to see a naturopath. My first visit was $225, the second one was $135. Hair fall stopped pretty much by the second visit. She got my blood work from my doctor, told me I was in menopause and experiencing low iron (I have never had low iron in my life). Also, I had been waking up in the night - every night for several months - at least 5 times a night - which wasn't like me.
In the end, the naturopath started me on liquid iron 2-3 times a week (taken after eating) and on one teaspoon of dong quai/day (tastes awful but oh well). That was it. No more hair fall, no more waking up in the night. I have never experienced hot flashes. I have one more follow up appt.
What helps with hair growth is 2-3 times/week give your scalp a massage with a mix of coconut oil/castor oil (2 parts coconut to one part castor) for 10-20 minutes while watching tv. You can even sleep with the stuff in your hair just protect your pillow. You hair will be beautiful and not weighted down. If you do this while seeking help for the underlying cause ('cos there is one), hopefully your hair will return.
For me, seeing the naturopath was worth the money - which wasn't much in the end.
Good luck.
I hope this isn't too much information.