positive ovulation tests

So I have grown to hate ovulation tests. I took one Tuesday for the fun of it for the first time this cycle and it came back very positive. The test line was darker than the control line. I took one yesterday and the control line was just alittle bit lighter. Today I took one and I would say it's a positive result again...I'm confused. These are the tests in order from Tuesday,Wednesday, and today. What do you think??