My hair has been shedding ridiculously for the past year and it hasn't stopped, it's so bad I'm beginning to see my scalp and my hair line is becoming less dense. A traumatic incident happened around about a year ago and I went into depression/crash diet/drugs & alcohol for an extensive amount of time till eventually I quit it all and turned my life around. Since then I've focused on my health tremendously however I have noticed my hair has not gone back to it original state. What is wrong?