Frustrated

So frustrated. I understand we Can ovulate later but no stress in my life. I’ve always had a 28 day cycle even before my first pregnancy & since I was 12. We only been ttc for 3 months. Anyway May 11 I was supposed to get my period, nothing. Tested negative and blood test negative. Well I’m 18 days LATE and my period it seems just started!! Wtf? I was supposed to get my period June 8th but idk if since I missed one my body is on a new schedule?? What do y’all think?