at random sometimes... I have large amounts of discharge that leak out. It's white and clear... sometimes thick or really watery-like. What is this?

There could be HEAPS of reasons you have excessive discharge.

You could be ovulating, you might have an infection, your hormones might be slightly imbalanced, you might be stressed, you might be even be peri-menopausal (depending on your age).

I'd suggest that the best and most sensible thing to do is to see your doctor - rule out any infections and take his/her advice about whether to get your hormones tested.

Discharge changes throughout the month depending on where you are in your cycle. If it's not yellowish/greenish, there is no foul odor, no pain/itching, then it is simply cervical mucous.