I have regular cycles and have tracked my ovulation for 7 months always getting a postive. I'm on clomid 150mg this cycle and metformin. Just started the metformin this month. I've always had postive ovulation tests on day 14. Last month was day 13. Today is now day 15 and it's still negative. Is it normal to just not ovulate one month? Shouldn't the clomid and metformin help make this happen, especially if I've never had problems before? I'm freaking out because my cycles are so normal. Would this happen if I'm pregnant? Or am I just over thinking things?