OPK Question

Ok guys so i was due to O Saturday 10/28 I had been taking the test and had low fertility up until that Saturday morning I got a peak positive both lines were dark and they hadn’t been that dark but were increasing in color before hand .... I’ve been feeling nauseous as of today and had egg white discharge on Saturday 11/4 I decided to go home and test again with my opk my lines on test are faint and control is dark but it’s showing higher fertility face I’m so confused to what’s going on anyone experienced this btw I’m using clear blue advance ..... I have very heavy watery milk discharge today and been nauseated all day. Help