3 days before af is due took a test and it was negative. I’m having a lot of cm which I don’t remember having this much so close to af. Looks white, but when I put it on toilet paper it looks yellowish? No itching or burning so it’s not an infection..I’ve been crampy and having lower back pain since a few days after ovulation, which is also not normal for me 🤷🏼‍♀️ thoughts?