Drug Store Ovulation tests, Brands and opinions.

Sarah • 19, fiance is 26. Ttc for 2 years 3 months.
This Friday my fiance and I are looking to buy a drug store ovulation test. I haven't seen AF since May (about 4 months ago) so I don't know if I'm even ovulating. I feel like the tests would be more accurate at telling me whether or not I'm ovulating. I'm leaning towards First Response but we would love some feed back from people who have tried drug store ovulation tests and what brand they were. Did they work in helping you concieve? Let us know :)