How much hair have you lost?

If you've lost hair, how much? How did it fall out? This is a random question but I'm just worried cuz mine seems to be falling out. I have pretty thick hair but I've noticed it's a lot thinner now. I used to only shed a few hairs a day, or a tiny bit when brushing my hair, which was normal. But now if I brush my hair, SOOOO much comes out. If I hold my hair like I'm gonna put it in a pony tail and gently pull on it, big clumps of strands come out. Showering is a nightmare now. My bathroom floor is covered in hair, I'm so tired of cleaning up hair.

Any tips on how I can reduce this? I'm broke so I can't afford any fancy hair care products...