First Response Digital Ovulation Test

Hi ladies, I am TTC for my second.

My first happened first try so not too familiar with ovulation tests.

I started testing on day 5 of my period as indicated which was Dec 18 and today I got my first positive LH surge. We have been baby dancing the last few days and plan to again for the next 2/3.

The instructions tell me there is no need for further testing this month and to throw out the digital reader. What is the best way to keep testing to so I can more accurately predict my ovulation day or do I just assume it will be 1-2 days after my positive LH surge?