Don't feel pregnant but am??

I am approximately 6 weeks 6 days pregnany. And so far I haven't had any morning sickness or any symptoms besides my breast hurting  but I am taking progesterone so I feel like they are only sore because of that. Is this normal to feel this way? I had a missed miscarriage last year at 8 weeks 3 days and with that pregnancy I was tired, nauseous and from what I remember I felt more pregnant than I do now. I don't have my first ultrasound until next Monday the 15th and I am a nervous wreck. Has anyone had a similar experience and everything ended up fine??