Found out too early

I am going thru my 2nd pregnancy.. Went for scan twice and both times they say its still too early.. Currently i am at 6 weeks i think n no fetus is yet to be seen... When scan,doc only able to see the water bag,egg yolk sac and the egg yolk... Going for another scan in 2 weeks time but doctor said to be mentally prepared... Hopefully by then cn see a heartbeat if not it means the egg stop developing... Any advice or tips for me? Anyone ever had similar experiences?? #pleasehelp