Look for a bit of reassurance

Hi little back story I have been ttc for about 10 months now, I had a miscarriage and 2 chemicals so far and am currently 6 weeks 3 days with my 4th pregnancy, I have been extremely fatigue and really sore boobs since finding out and suddenly over night I could barely sleep and was wide awake after 3 hours sleep and my boobs no longer hurt.. please someone tell me symptoms can disappear and it doesn't mean the worst!? With my first miscarriage I lost my nauseousness and I bled the next day. Thanks guys