Can't believe I didn't see this earlier. Discharge when not pregnant can be caused by high levels of prolactin, which interfere with the release of progesterone needed to support early pregnancy. I was leaking too, and got drugs to lower my prolactin back to fertile levels. I have also had breast infections while not lactating. Please get it checked out, I think CD3, 14 and 21 are the benchmarks, in the morning before breakfast, need to avoid sex and nipple stimulation immediately before.

xoxo
M