When should I test? AF not due 10/17

As

I have the most irregular cycle. With this being our first month ttc, my doctor suggested OPK testing everyday after period to track when I ovulate.

I received LH surge on 10/3 in the evening, which is cd6. I anticipate I'm 1dpo.... not that far into the tww.

I have Early Response tests, so what days should I test? Should I start 10/12? 6 days before AF?