Did your tests get progressively lighter until turning negative, or did anymore have a dark line one day and gone the next?
Day 10 is Sunday for me and my daughters birthday party is on Saturday. Today is day 5 and my second line is so dark still 
Wondering if we're doomed to cancel or whether there's hope yet.
To complicate things further we need to let the cake supplier know by tomorrow if we do want to postpone.