Could I still be in my fertile window

Anoushka • Mother to 2, boy and girl trying for number 3 .
According to my App my fertile window ended a couple days ago but I'm still having egg white cm. Today I feel blah with not cramping but just discomfort in lower abd and slight back ache not due Af till 11th Jan . None of my ovulation test have been poss had a few unclear ones . I also had slight pink in my cm on the 26th Dec ( in my window)