So - after some extensive googling (and mostly only finding useful information on forums), I have reached some conclusions:
* It is possible to continue getting positive OPKs for several days after you've ovulated
* You should go with your first positive, or the darkest line for your "true positive"
* You should rely on BBT to confirm O after rather than your confusing OPKs.
My darkest line was Sunday evening. I then had intense ov pains on Monday morning. My CM completely dried up that day, as it always does on Ov day, and my CP also went from high to medium (when I checked today). Therefore, I believe I ovulated on Monday and I am going to stop testing, provided my temps still rise tomorrow. If they go down again, I'll have a different problem on my hands.
Also, provided my temps go up tomorrow, I am officially done BDing for the cycle. I cannot stand another minute of it!!!
Based on Monday ov, AF should be due Mon, Oct. 7th. Then again, I am starting to think OF is predicting my ov day a day late and my LP might actually be 14 days...in which case it will be due on the 8th. Hopefully I won't have to find out.