fertility question

hi all! i have never posted before. im 35 and we have stopped preventing 3 months ago. this month was the first month i took ovulation tests and then accordingly we did our thing. that was 2 weeks ago. i have been cramping for 5 days now but no period. i am now 2 days late super crampy but nothing. i took a test 2 days ago andnit was negative. is it possible its still too early to show? anyone had to wait to get a positive? common?