I have irregular cycles. Some 30 days some as long as 55 day cycles. So I started using opks this cycle at CD 12. I have seen them gradually get darker. Today is CD 20 and the Opk at 2pm was the same color as the control line. Is it possible that I am fixing to ovulate or do I need to wait til the test line is darker. I will take my other opk at 8pm tonight. Ps I use internet cheapies