Help me im losing my hair!!!?

someone please help me out. im 20 years old and female.. over the passed month i have been losing so much hair and its just getting worse and worse! When I shower clumps are at the drain and whe I brush it the brush gets filled! theres probably about 700 hairs after a shower.

When ever i run my hand through my hair at any time, no matter how many times i do it, i honestly get 25 strands each time i counted. my hair used to be thick now its really really thin. this is upsetting me real bad. i got my blood tested and it came back negative. what could this be what do i do i am so scared! i have no bald spots but its just falling out everywhere like crazy and my hair is so thin now.Help me im losing my hair!!!?
Are you on any new medications or are you not eating properly? Sometimes if we are unhealthy by not getting some nutrients it can cause hair loss. I'm surprised the doctors didn't run more tests on you. It could be just stress also, so try working out. Good Luck!!Help me im losing my hair!!!?
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just asking??

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