since 3 yrs ago, i give birth to my daugter, every time i try to get up from my bed or a chair i fall down with out warnning. my legs are not sleeping or numbness it's just give up. i just turn 31, i'm to young for that,i went to my doctor i got blood test done she i just need more iron on my deit, she thinks i don't have feelings on them or are sleeping,i said there not sleeping i could feel my legs there just give up.one day i was try to picked up my daugther from the floor,samething happen thank God i was close to my bed i just fall on it and i dropped her.please any body who knows what it is let me know.thank you