Positive on Tuesday and yesterday? Negative today?

Paige • 23- UK. Our little pea due November2017 ❤🌈🌞
I did lh surge on Tuesday and it was positive then did one yesterday and it was positive. Last night when I was in bed I kept getting shooting pains in my left side it felt like ovulation pains. I did lh surge today and it was negative. Does this mean iv already ovulated? Can I class myself as 1dpo from today? Tia x