7 week scan normal?

last week scan lupa minta gmbr. Doc say 6 weeks and suruh dtg balik after a week utk ambil darah. I ask for another scan as supposed to be 7 weeks this week, but x nmpk apa², just that dot there. Risau, so i ask Doc so far ok tak, she say all ok... this is my first so, everything makes me worry. Is this nornal?#1stimemom #advicepls