2.5 weeks late

Leticia • Hello, I`m the mother of two wonderful kids, Jay who is 5 years and Pyn who is 1. I`ve wanted another child as soon as Pyn was born but chose to give her my all before trying for one. I`m ready now!
So as the title states I'm almost two and held weeks late on my period. My husband and I have been trying for only 5 months after being on bc for 2 years. Last month was my wedding and leading up to it my period was 3 wkd late but someone told me my ovulation days was delayed from stress. Anyways I feel I'm stress free after my wedding, very happy in fact but my period is just missing. I took a hpt last week and it was bfn but AF still hasn't showed up? Any ideas that might be causing this?