In my humble opinion, I really think if u consider that frers basically pick up as soon as ur pregnant, that it's more likely u conceived in the last 10 days and that ur actually still under 4 wks pregnant as ur frer was quite light still, and that u just happened to test on one of the first days ud get a bfp. I also do see a line on ur frer, my frer was darker than urs at what I think was about 10 dpo, just to give u an idea, though obviously hcg varies widely. Have u bd in the last 10 days? Though obviously only a scan will tell you exactly but you won't see much on a scan till hcg is about 2000 anyway so U may need to wait a little while. Keep us posted! Is ur husband over the moon? X