Dropping Hair

Hair is falling out/thinning veru quick. ANY HELP PLEASE ONLY 19 :( :(?

hi guys any help would be great..im 19 years old.. work in the city very stressfull job wich i may be changing.. over the past year i have noticed my hair slowly falling out more and more while i washed it or brushed my hair. it slowed down for a couple of months but this year its speeded up like double and the front mf my hair has thinned quiet a bit.. in my family (dads side most are bold) mothers side is 50 50.. i smoke weed tr to stay healthy and i train 1ce -2wice a week.. Ive been hearing there are pills i can take to stop it from happening.i have also hurd there is a laser comb i can buy wich stimulates the end of the hair and makes ir healthy stonger and prmotes regrowth. if i keep my hair short will the fall out thinning take slower or not happen. becasue ive noticed when my hair is longer its falls out alot easyer. any helpMANY THANKS

Hair is falling out/thinning veru quick. ANY HELP PLEASE ONLY 19 :( :(?