Help ? Am I worrying for no reason?

I got my BFP last week and I am 5 weeks pregnant. Before I tested I was having all sorts of symptoms, really sore boobies, nausea, extra smell, cravings and cramping. Now I don't even feel pregnant, everything but slight soreness in my breast has gone away! Everything I read says morning sickness is a sign of a healthy pregnancy, just worries me that it has all gone away.  I also have been having horriable dreams about having a miscarriage, it's freaking me out!!