What are some reaaons for having a lot of discharge?

Hormones, infection. Assuming you mean vaginal discharge, mild white vaginal discharge is normal and is due to hormonal changes in a woman's body. If your discharge becomes copious, foul smelling, or greenish, this could be a sign of infection. In that case it would be best to see a doctor.
Many Reasons. You should have a pelvic exam for culture and other testing. If you have not had a pap smear, it could be done at the same time.