Okay my ovulation test are contradicting one another. This morning it was positive. But I just took one again and it's negative. WTF!!!! My uterus is killing me so crampy I can't even go for a jog. It's day 17 I should have ovulated. Shouldn't I? Anyone with any similar experience? Or words of encouragement? I can't help but think it's because I bought the cheap Walmart brand ovulation tests. HELP!!!