Ovulating?? Test line darker than control line.

Michelle
Okay, I took an ovulation test last Monday and I thought it was positive, and have had negative results after that. A few min ago, I took a test, and the test line is visibly darker than the control line! Was my test last Monday a false positive? I've never had my test line darker than the control.. What does this mean? I'm on day 20 of my cycle.