Sarina, that sounds like a lot of hair coming out (especially if it's not seasonal shedding and you don't see the white bulb).
What kind of comb are you using? If you don't already have one, make sure you use a good wide-toothed comb to help minimize breakage.
Also, are you relaxed or natural, and how do you wear your hair? Do you lose that much hair from daily styling, or is it when you wash your hair? And, lastly, when you wash your hair, do you detangle it while it's wet or dry?
I greatly reduced the amount of hair I'd lose while combing by (1) ALWAYS using a good comb. The wider spaced/longer the teeth, the better. (2) ALWAYS detangling my hair while using LOTS of conditioner in the shower while my hair is still wet. (3) Washing/conditioning/combing out my hair in sections.
Sarina, what is your hair regime?