I thought it odd that other people took more than one OPK per day. Now I'm here and get it. My RE Reccommended to test between 12-2pm each day. I tested at 11 am today bc I was afraid I would forget. It was a clear blue easy digital test, and was negative for the LH surge.

Later, I decided to try with the cheap "At Home" brand I bought off amazon at 1:50 pm. It tested positive. Then, I decided, I should try the clear blue again. And, it showed negative! So I tried a second one of the cheap tests. And it's positive.

Anyone else had trouble with mixed results based on brand??