No period yet.. but ovulating already ?

I am 8 days late on my period and this is the second time in a row that it’s happened but according to my calendar last week, it should of came already. I took 2 pregnancy tests on the first 2-3 days of missing it and it said I am not pregnant. Now I have clear egg white in my underwear with some white parts today..

Has anyone else had this problem ? I am so lost ! What’s wrong ?