Scaring Myself

Ok, so I am 7 weeks 3 days pregnant (according to the last period I had). I am worrying myself a ton though because I am scared of miscarrying. I had irregular periods before I got pregnant, but the tests say I am pregnant! My husband and I are very excited, though I am very nervous just because I don't feel pregnant. I am not sick, though I have been nausious, but not regularly. I need some comfort!!!