False Negatives with curved First response?

Nina
I took a FR pregnancy test today (the new curved ones) because I thought I started my period early but now it's pretty much gone... and it was definitely positive. I was all...Omg WHAAAAT!? I've been reading that these new ones cause false positives. All the testsof this brand I have taken in the past months were totally BFN. Anyone get a false negative from these? And what did it look like? I don't want to freak out just yet...but I totally am.