I voted wrong too!! My first I only found out around 6 weeks. I didn't notice anything except late period.
this time around we were so prepared that I tested 7 days after suspected conception (as the test said) and there was the faintest line. This was probably about 3 and a half weeks. Im now 8 weeks and because I found out so early, it feels like I should be 12 weeks, not 8!!