Everything I'm reading says that you don't actually implant until week 4. And that you won't know your pregnant until week 4. I know I ovulated on dec 1 and had a BFP 10 dpo. My calculations say I'm 3 weeks 4 days however... Is this true if "what to expect", glow, and all the other  pregnancy things I've read say that the baby doesn't implant until 4 weeks... Maybe I'm farther along than I thought?