I'd be worried if it was that much ...

A lot of discharge can be thrush - apparently when pregnant you're extra susceptible to it, because of the extra oestrogen ...

But I'd be much more concerned that it is amniotic fluid, and I'd be wanting to know whether I need to keep my legs up for the rest of the pregnancy or something else ... there's a simple swab test they can do to check whether it's amniotic fluid - I had to have the test last pregnancy. They swab, you wait (and quietly freak out completely) for 10 minutes, and then you have an answer, and can plan accordingly.

If I were you, I'd see if you can get the test done ... for peace of mind, if nothing else.

I hope you're not freaking out ...