need some positivity

Emilee • married 8/12/17 👰I have an angel baby 👼 proud mommy of my rainbow baby💙

So last August I miscarried at 5 weeks 5 days. yesterday I found put I'm pregnant again I should be around 6 weeks. i went to get checked out just to make sure everything was going ok. They did an ultrasound and found a gestational sac and saw a mucus plug but didn't see a baby yet. should I be worried?