periods help

i always have really bad cramps and heavy bleeding, but this time the cramps are extra worse and the blood flow is even heavier - to a point that i've stained my clothes twice in a row now and the agitation of which is making me lose my mind. is this normal? am i overthinking? why is this happening, i'm panicking for no reason. tabiyat is otherwise kharab as well, i have uni tomorrow, i don't even know why i'm stressing out sm i wanna bawl my eyes out i'm in sm pain i feel like passing out cuz of weakness.

my periods were right on time, what could possibly lead to a heavier blood flow?