Hi gbob, I was the same like you. At 4 Weeks, I've had slight nausea, dizziness, warm body but all these vanished suddenly at end of 4 Weeks. Panicked, can't sleep well, keep thinking. Emailed my doc. He says no worries, he wants to see me in 2 Weeks time. But at about 5w, I really cannot tahan. Instead of being happily pregnant, I was paranoid. I dropped by the kkh o&g to check. The doc got a specialist gynae to scan me. That time can only see a sac and yolk. After talking to some mummies here, I decided to be positive. Subsequently relaxed myself. Not easy but still have to do it as stress will affect bb too. Take it easy.