Wtf I'm confused!!!!

So last week I go in to the ER for bleeding I was told I measure 5 weeks and 2 days so today I go in for an us and the tech says I measure the same that the other lady went off my lmp and not to worry just come back In a week!! She told me not to stress and worry but how can I not worry because everything looked fine! Please tell me this has happened and good things can come from it!!!