My fertile window has moved... I am so confused

Ok so yesterday glow was telling me I was 10dpo. During my fertile window we were on it and bd'ed as much as possible. Thought I even had signs of my ovulation. Since then I have been inputting my bbt as usual which is currently continuing to rise and this morning when I put in my bbt my fertile window changed so glow is now saying I am 2dpo. If this second prediction is correct we missed ovulation! I am so confused. Was feeling so hopeful this month and been symptom spotting (had quite a few positive signs) but now I don't know what to think. Af due 21st and the waiting is killing me. Anyone else has similar situations?