Never having any positives

Hi girls.

Need some advice, I’ve been trying since January and been using clear and simple ovulation tests and not had a positive yet!!!!

I start testing round day 15, as my cycles are around 32 days long. But I haven’t had a positive yet. I’ve missed the odd day here and there when I’ve forgotten to do them.

I have PCOS but only on the right ovary, left ovary is completely normal, also I’m 19.

Is there a better brand to use? Are clear and simple not the best ones to use?

Thanks in advance ladies xxx