INPUT LADIES!! Wondering if I ovulate early


Okay so I had my Mirena taken out in August and I’ve been logging consistently ever since. I have a 25 day cycle and I’ve been doing OV tests on all my green fertile windows. Some days I get pretty dark lines but not quite there and then the next is light. Being that I have a 25 day cycle, do you think it is possible I ovulate on my 8-11 day? This month I tested on my 10th day and it was low, never got a surge.