Hey so... I've been having a LOT of thick, kind of light-yellow (really really light), sometimes pale whitish discharge lately. Its sometimes odorless, and sometimes has a sour smell to it. The last time i saw the gyno i was tested for STD's and I came back clean, and haven't had sex since then. I don't think it's a yeast infection because it doesn't hurt or anything. Any thoughts?? help! thanks =)