Fertile CM

So I really hope I’m not the only one with this problem or question. You know how fertile CM is like egg yolk... well I see other woman experiencing it and as far as I’ve noticed, I never have. Sometimes it gets a little thinner but it’s never clear or super thin; it’s always kinda thick... Any advice? Or any way I could pay more attention? I only really notice by what’s in my underwear. I guess I could try OPK’s but when I’ve tried them (from the dollar store) they never worked, probably just didn’t take them at the right time though. I also had a mmc back in March and a D&C in April, not that it means that much in this case but js. Anyone have an ideas?