Mixed ovulation tests

[Bmccloud34]

I am 22 years old and have been diagnosed with pcos. My husband and I have been ttc for 2 months on 50 mg Clomid. Last month I used the great value ovulation tests, and had issues with the control line getting dark. I did receive a positive, the lines were just lighter than I expected. A day 21 progesterone test confirmed the positive. This month I have been using the clearblue digital tests. I have yet to receive a positive, but did get a positive result on the great value. The great value was taken with my first morning urine. The clearblue was taken later in the day after restricting fluid intake. This is the same cycle day that I received a positive last month. Which test should I believe?