Spotting but Positive Ovulation

I posted last weekend that I was having very minor spotting. That continued off and on this week so I started to assume that it was af even though it was no where near what I consider my typical period. Today I took an ovulation test because I ovulated around cd 11 last month. The test was almost what I would consider positive. Should I assume this was af or unexplained spotting? Still not sure about the positive opk?