I thought faint lines were negative though? I thought it was only positive if the test line is darker than the control line? Although saying that, I don't think they work too well for me. I remember the last day I ovulated (which I think is the day I actually got pregnant), it came up with a dark line but it wasn't anywhere near as dark as the control line. I knew I OV'd that day though because I had all the cramps. Saying that, I think they say that your OPKs can vary depending on what time of day you take them so it may very well be that if I had used it in the evening as well, it would have been positive.
I'll just wait for my OV pains I suppose and keep testing. Roll on my OPK BFP. Me and my husband are trying again, and are going for it every other night, until I feel I'm OV'ing (if and when that happens!), then we'll go for every night for 3 or 4 days.
On a positive note, I am getting BFNs on my pregnancy tests now so roll on my next BFP! As long as it's a sticky this time, I don't want to know if it isn't!