DH and I accidentally-on-purpose had unprotected sex on the day I estimated I was ovulating (based on dates, supported by signs). We're not TTC yet but got carried away with chatter of how great it'll be to complete our family :o
I can't test for at least another five days but I'm peeing loads and I've got a superhuman sense of smell, I'm also tired and have tingly nips.
Could be PMT, could be the start of a bug, could be the start of something else :)
With DC1 I didn't know until I got a positive test and had virtually no symptoms until around week 6 or 7. With DC2 I knew almost right away that I was pregnant, a week after conception my diary entry reads "think I'm pregnant?" and I had nausea and other signs by week two, didn't get a positive test until week four.
What were your earliest signs and how soon did you experience them?