What are your thoughts?

Logan

I was supposed to start my period on the 5th and I usually start 2-3 days early every time. I still haven’t started my new period which I’m basically 4-5 days late. I took two different pregnancy test and both came back negative. I still confused on why I haven’t started my period. I’m not stressed out about and thing. I’m also 16 years old. Thoughts?