Your USG scan reveals SLIUF with 6 wk age but GS is small and yolk sac
It sometimes indicate miscarriage/pregnancy
loss due to abnormal development/calcification.Do repeat USG scan after 4 wk to get details of FPP.
Inj Proluton is Hydroxy progesterone
and useful in preventing pregnancy loss but not always 100%.
Take Folic acid
supplements with essential vitamins and protein rich diet. Avoid heavy work/stepping uneven surface,take adequate rest and maintain hygiene properly.
Do periodic check up. Be well.