High fertility on day 25 of cycle?!?!

I’m new to this whole tracking cycle business! Boy is there so much to learn. I’ve started using ovulation a tests after a couple of months of trying. First month I used the cheap ones from eBay, not a single positive. This month I’ve used the clearblue digital - (the one that has, low, high and peak) the last three days I’ve had the flashing smiley face (high) which I was super excited about, then I realised I’m currently on day 25 of my cycle?! All the google says is I may have ‘late ovulation’ which is caused by irregular periods. But my period is regular like clockwork - is it possible to just ovulate later in a cycle? I am so confused!