About 5 days after conception, I was lying in the tub and I could feel a slight burning sensation on the left side of my uterus. I joked to my girlfriend that I had just felt the baby bite on (implant). I told my midwife at 8 wks that I still felt tender in that spot. She kinda looked at me funny. Today at 11.3 wks she did my first Doppler and sure enough the baby was exactly where I've felt it this whole time. Pretty neat.