I read somewhere that sometimes you have EWCM on and off during the latter part of your cycle because your body keeps trying to ovulate but doesn't. So it is preparing itself for ovulation, which is evident by the CM, but then the egg isn't released so your body tries again in another couple days, so more EWCM. I am pretty sure this is what is happening to me. I have low progesterone levels and haven't been ovulating until anywhere from day 18 to 25 but have EWCM a few times before that. So I think my body is trying earlier but doesn't actually ovulate until later in my cycle. I am pretty sure that once you have ovulated, your CM should dry up so you should watch for that as a sign that you have finally ovulated. Of course if it is an anovulatory cycle it likely won't dry up at all, you will just eventually get a period because the lining has built up so much. If you think you likely haven't ovulated yet, I would wait as long as you can to test so you can avoid that disappointment. You may just ovulate late, like I have been.

Good luck!