Hi, I have been TTC for 5 months now, so not very long, however, this month I am late for AF (by 2-3 days), which in itself is strange as my AF is very regular. However, did a POAS this morning (one of those expensive digital thingys) but it said BFN.. Anyone else had this, am I stressing myself out and making AF late this month, or is there a possible chance that the test is wrong? 
Thanks for any input!