BFN no signs of AF

Had a BFN test this morning and this is day 34 of my cycle with them usually being 31-33 days and no sign of AF. Has anyone had a negative this late and then a positive follow? I had an ectopic in Jan and the home test was negative but the dr urine test was positive 3 days later... I’m so paranoid this is happening again. Had an HSG done and progesterone tested and all was clear and good numbers. Hubby is about to get tested soon. I guess poor sperm quality can contribute to ectopics. Ugh!!!