Can someone answer this please :)

Okay is it common to have a mixture of different cm ? Since yesterday I have had really watery cm , and then I'll check my cervix and it will be thick an white like snot(sorry tmi) but I'm 11dpo I tested bfn this morning . All day tuseday and wednseday I was completely dry . I was thinking AF was coming because I had a lot of cramps that started on Monday , but then yesterday I still had the cramping along with a lot of cm and today it's continued . But the cm keeps changing . It's either very watery or thick . I personally don't know how to chart it because it keeps changing .