Help confused

Mary • Hello my names mary im 33 my husband is 38 we have been married since this july 2015 been together since april of 08 we have two beautiful daughters ages 15 and 7 and s sob thsts 4
So i have been using the clear blue advanced opks. And ok so on cd 12 on the 10th it read a lh surge and then two days after i did it again and it was negitive so i thought wth and decided to do itthismorning and it red a lh surge again im confused ladies what do u think it is