I originally tested with the old design when I got my bfp. The following day, my line was already so much darker (again, on the old design). I took a test this morning at 13dpo with the new design, expecting it to be darker than my last, and it's not. I'm hoping it's just the difference in test.. Should I go buy the old design again and see what happens? Also, should I call me ob and see if I can get in for a blood draw sooner than my appt of September 16th?