All normal but no positive FSH sticks!!

Sarah

Hi everyone

I've had blood tests and they all came back normal (FSH / serums the lot!)

I've had a transvaginal ultrasound and again, all normal.

Why then, are my AFs irregular (46-34-19 days were my last 3 cycles) and just one positive FSH per test yesterday, but a blank negative FSH strip today!!! What am I missing here? Please help xx