So I have been tracking ovulation using the easy@home tests which have always gave me clear results (in the photo you can see the easy@home test above is a clear positive) but I also tried using an IC brand of Amazon (core test I think it's called) and it has never given me a positive, even when the easy@home has shown peak fertility. In the photo attached both tests were taken at the same time with same urine but the IC brand is clearly a negative. What test should I trust?!