Hallo friend ,
As per your symptom -mild discomfort in upper area of rt sided of abdomen.
And your usg showing nothing significant except mild hepatomegaly
So no worry about liver sol or gall bladder stone
Mostly your symptom is due to mild hepatomegaly or may be peptic ulcer
which may be present like this.
Consult your physician,If you are alcoholic then stop it cause it may be the cause of your mild hepatomegaly..