Late period? Out of norm

Hi ladies, AF is not here and it was supposed to arrive yesterday. I stopped taking birth control in April  when I had a chemical miscarriage. Since then, I have been off of birth control and my periods have been exactly on point except for this month. I get married in two weeks and I'm wondering if the stress or anxiousness may be causing this late period. I took a pregnancy test and it came up negative so it's a waiting game for AF's arrival now.