I would still take one around the 6th or so, when your period would have come from being on the pill. If it shows negative, take another one 2 weeks later. This way if you are pregnant, you are not waiting for such a long time to find out and get in to see your doctor!!!!!!
I have been off the pill for 5 mths now, and have only had 2 periods. Twice now, I thought for sure I was pregnant, but no such luck for me
good luck and keep us all posted!