I've been trying to concieve for a while and im now 6 days late . pregnancy tests are showing negative. i would always be on time. what could be wrong?

Needs clarification: You have pregnancy tests done-which one-urine or blood test. Urine pregnancy test may not shown yet if hormone is low , but sreum pregnancy test should show already if you are pregnant.Otherwise stress or hormone imbalance including thyroid may affact your period.You need to get evaluate if this is a new symptomfor you.

Maybe nothing: Menses can vary normally perhaps you did not ovulate that month so your period would not be on time check with gyn to be sure you are ovulating good luck.