They reckon it should be 36-48 hours after your first positive OPK but maybe you're having a super-long surge? As I understand it the LH level should dip immediately after you actually ovulate. I've read comments that say sometimes your body is really trying to to ovulate but doesn't realease the egg so it just keeps trying, so you keep getting positives.
But tbh I've found that whatever it is that your unsure about with TTC, you will always find someone on a forum somewhere who will say it's a good thing and someone who'll say its a bad thing! Sometimes (actually, a lot of the time) reading stuff off a million and one forums makes me more confused than I was to begin with!
If I were you I'd just record, record, record. Take pics of OPKs, write down what's going on with you emotionally and physically each day and then at least if it's not your month then you can compare and contrast next month. That way if you're disappointed you've got something to go off next time, and you can feel a bit more in tune with your body and what's normal for you (the main reason there's so much confusion about TTC is that every woman, every cycle and every pregnancy is different whether we like it or not!).
Sorry I can't be of any help.
Love and luck,
Lou xx