1 week late...

I am now one week late and took hpt this morning. I thought I saw something but I could just have line eyes. Do y'all see anything? 
I'm starting to get worried about why I am so late. I have only ever been 2 days late and I was super stressed. I haven't been stressed or anything lately. So I'm getting worried that something is wrong. When should I test agin or call my doctor?