

Chunks of hair falling out + dandruff/sebborheic dermatitis for the past three months, advice needed (19F)
CW: hair and scalp :(
so this started about a week after my final college exams in mid may - chunks of my hair will come out every time i run my hair through it in the shower, i shed all the time and a couple strands will fall out everytime i so much as even touch my hair. in the pic, that's how much comes out after running it through my head twice, and even more came out as many times as i worked shampoo and conditioner into my hair.
i had a really rough couple of weeks leading up to and during my finals (spending 14 hours a day in the library and only coming out for lunch and dinner) but for the effects to last for months is so dramatic. this is accompanied with dandruff/sebborheic dermatitis which I've had before and comes and goes but never as bad as it has been recently.
I've been taking b-complex pills daily because that's what my father said fixed his sebborheic dermatitis + 4 pills of 900mcg biotin to help with it, but zero changes seem to have happened. all the biotin did was make my fingernails super strong. I'm terrified to brush my hair in the morning because the horror of seeing just how much I'm losing. I've been trying to convince myself my scalp looks fine but i really think 19 is too early to be balding.
any advice is greatly appreciated :(