Baby dust needed!!!

I was diagnosed with PCOS 10 years ago, i got pregnant 6 years into trying. Now i went with a new OBGYN and she said she dont see a problen with me getting pregnant again. I have been tracking my ovulation every month with the clearblue digital. Every month i can feel when im ovulation and as soon as i test i get a positive, the day i got a positive my OBGYN sent me for blood work to make sure i did really ovulate, and to my suprise results came back negative when my clearblue digital said positive. I was bummed i felt like a spent all this money on all these tests. Now i font even bother to buy them. I hope and wish i get pregnant with baby# 2 soon.