First response ovulation test..grrr

I am getting very frustrated with this ovulation test. Glow said I ovulated Sunday but I have been getting nothing but "no"s and "?" On every test-FR doesn't even address a "?" In the instructions, what the heck?! I assume I am just ovulating late but u don't know. I also got a cheaper brand to and until last night those were neg for an LH surge as well. We've been trying for a few months but this is my first month using these tests so I don't know if it's my cycle, or me  or I am doing it wrong. By advice would be helpful..