Can anyone help me understand my chart?

Vickie

I have been temping since April now and my last few charts I have been able to see when I ovulated immediately because of the temperature shift. This month I am very confused, I’m on cycle day 40 (usually 35-37) and no idea if I have ovulated yet or not. My chart just doesn’t look right to me. I have been travelling and missed temping one day so I don’t know if that would have such an effect. I got all negative opks between Sep 8-17 and 25-30. I didn’t take any while travelling. We have used protection for most of this cycle so I highly doubt I’m pregnant. Any insight would be great. Thanks 😊