Ovulation question

L

So my app showed I should’ve ovulated on the 8th. My period was 1/25-1/30 (I don’t have regular periods) well when I tested it wasn’t positive then it got lighter so I figured I would’ve just missed my peek this month. But today I noticed some clear discharge and decided to test again and it was a DARK positive. So is it just because I’m not regular that I’m just ovulating late? Or is there another reason for this?