Ovulation testing

Tara • Mom of three going on four!
I've ony just started using an ovulation kit this cycle. I'm on day 27 of my cycle and it still hasn't showed an Lh surge. I don't know if I should open another pack and keep testing or not. I had to take Provera to give me my first period to start this cycle. I'm not sure I'm going to ovulate as prior to my second child I was not due to high prolactin levels and had to take a pill to help me ovulate. I can't get in to the endocrinologist to do testing again until December. I just really want to have another little miracle. I might just stop testing until my next period, if I even get one naturally.