Is one way to test more accurate than another?

My question would be which is more accurate: taking your temp. Checking your CM, or the ovulation strips? I'm normally hot blooded I go to sleep in shorts and a cami every night but where I live we have been getting these random cold fronts that I think are effecting my bbt. And I have been checking my cervical mucus but I just seen to produce a lot of it even with the primrose oil and tons of water! My fertile window opens on Sunday which going by the ovulation test seems pretty accurate. So my question is: If my CM description isent 100% accurate, and if my normal 99.2ish. Temp. Drops down to 96.6 as long as I have a positive ovulation test I should be fertile? Right? ​