i have had 2 HPT's that have been positive with one negative inbetween, i did a test yesterday afternoon as DH hadn't seen the slightly darker lines and it was negative Im very confused now 2 positive and 2 negative, Im 17 DPO so should well and truly be only showing positives by now, could it be a defective lot of tests and not showing true results? I would also be on CD38 which my longest ever cycle without being pregnant is 33, should i go buy a different brand of tests?