negative test period 5 days late

Has anyone been 5 days late and tested day 4 late and was negative but we're in fact pregnant?? I am not trying right now, I was going to start trying for my third on my honeymoon in August, so im kind of nervous cuz I get married in August. My period is ALWAYS on time and this month it hasn't showed up. I got it march 14 April 12 may 12, could test be wrong? I'm nervous.