I'm 33 with 4 ds' ages 11, 8, 2, 1. I've never had IB before but today I had some brown when I wiped. AF is due Mar 7 (in 7 days) could this be IB? It hasn't gotten any darker, but kinda still get some after every bathroom visit today. I'm not sure how long my LP is, but I got a positive opk on cd 13 (currently cd21) .. I guess I just want to know when I can test? Some websites say wait 3 days, but I know that frer says they can tell 6 days early which is tomorrow? ... frustrating