Waiting game :(

According to my Glow calendar for the month of March, my peak ovulation day was the 11th. Meaning I'm 16 DPO, however my period was supposed to come on the 19th but it was late. Took a test came out BFN. My calendar showed AF should of came 27, late again, BFN again. Now it claims AF should be here April 1st. I'm getting married April 11th so it is just stress of wedding planning throwing off my cycle? When should I test again? Should I just wait to see if my period ever comes? Just tired of waiting..