A great big CONGRATULATIONS to you!
Best wishes,
~Wendy
First off Lori.....CONGRATULATIONS!!!! I know you have waited so long for this and I am so happy for you sweets!!
Frer can actually pick up even lower then that. I had it pick up at 6 once (I was in the middle of a chemical, but still, it registered positive). I bet you either o'd earlier then you think, or implanted in 3 days, none of which are bad things. Frer is the most sensitive, so it doesn't surprise me that another brand would be lighter. Plus, remember these tests are qualatative, not quantative, so really, how light or dark the line is doesn't mean too much. Some brands always just show lighter then others.
Personally, the earliest I ever got a positive was about 5 days after O. With a frer, and early implantation, it's not terribly surprising to get a positive at 17DPO. Not super common perhaps, but not way out there. When do you have your first beta? I am so excited for you!!!!