I would test again in a couple of days. I have a feeling that for an OPK to register a + it has to be as dark as the control line or darker and shouldn't necessarily be taken as gospel anyway. As far as the lines on your OPK's are concerned, I've been testing every day since CD1 with Lullaby Conceptions OPKs and I have had a definite line EVERY day no matter what time I test, including just now and I'm only 5dpo.

Lisa