Is it any better or worse to start OPK too early?

Erica

So, I know that starting too late in your cycle with a 2-hormone OPK (estrogen and LH) is a problem. You can miss the early detection of estrogen, ovulation, or just getting a “high” chance everyday. But what about starting a day or 2 early? I know the main concern would be running out of strips for the reader. But, apart from that, can starting a bit early actually mess up the results? Causing false negatives or positives?