Hi. I am ttc after mc in sept. After some medical testing and some medicine changes I have finally been given the green light to ttc. Last month I tested and on the 19th clearly had a positive opk. Well this month it is not as clear plus I was using two different kinds of opk. I decided to use clear blue advance digital but read a review that the test did not detect the LH surge in several women when other test did. What do you think? (Af 3/5) Was there a surge? This is only my second month testing. Plus clear blue tested 'high' from the 18th to today. Thanks!