AF late but still no BFP

AF is late by 6 days (including today) and I still haven't got a BFP. I waiting is starting to drive me crazy. I'm not sure when I should go see my doctor I was thinking I might see what happens this weekend and go see him on Monday.

For those ladies who have had a chemical pregnancy what where your symptoms and how did you determine it was one?

Iv been pregnant twice both ended in still born babies. But with both pregnancy I got my BFP the day before or on the day my AF was due. So I'm not sure what's happening right now.