Not pregnant but really late.

Last period was at the end of may and I thought I had a pregnancy scare but I finally got the courage to take the test Saturday night and it came out negative.

So I've been a total of 33-35 days late.

Was the test wrong? Took 2.

I did have sex before the test. Could that change the results? && I also held the tip of the pregnancy test in the urine for about 3 seconds and went back in because i read it to be 5 seconds instead. Would that alter the results either? Or why else would I be so late??

TIA. XOXO