CM keeps changing!!!

Leighann • RIP my 👼🏾 03/2010, Mommy to Nova 04/2019 💕 and soon to be mommy of Parker 10/2020 💙!
A few days ago I had creamy like CM then today, I had watery ..... just a minute ago I checked and it's sticky/ stringy. My window started on the 15th (I believe) and I BD on the 17th 2x, once at like 2 am and the other time at around 9ish/10 ..... I'm just confused by the constant change. My bf sleeps all the time and works a lot, so we don't get to BD as much as we would like! Have y'all experienced changes like this and is this a good thing!