weird clumpy discharge?

for quite a while now (around a year) for usually a few weeks at a time, my discharge will be greenish and chunky? if not oddly colored, it is white, very watery and has tons of small clumps in it. no odd smell or itching, just weird discharge. i have been tested for STDs and am clean, and have just recently taken antibiotics for a yeast infection hoping that would help, but it has not. it’s getting to the point where i’m too embarrassed to have sex because of it, can anyone help please??