My period started on the 8th and ended on the 11th I've been using glow for three months. My period is pretty irregular with how many days are in between. So I really think glow is wrong about my ovulation days. I haven't been feeling the best and a few days ago I started getting more cm than I usually do. Also my cervix started low and soft today is was medium and soft. I also woke up with heart burn and I never get heart burn. Any advice on when I should test?