help! i’m losing a lot of hair/ balding?!?…

i’m 18 mtf , i’ve been noticing a lot of hair shedding the past 2 weeks , today my mom insisted on washing my hair cuz according to her i can’t do it properly? when she did she gasped and took this picture of the back of my head.. my hair used to be my pride.. my thick and healthy pride. i pass fairly well but this is really freaking me out. could this be estrogen? my hrt journey has been chaotic, i started blockers and estrogen 2 years ago, went on and off of it and started again 5 weeks ago.. please anyone, is there any input? i’m freaking out!