QUERY REGARDING WHOLE ABDOMEN ULTRASOUND

I am experiencing mild pain in the top right side of my abdomen for the past 1.5 yrs. I went for ultrasound many a times but the report was normal. In 2019 I went for whole abdomen MRI and gall bladder sludge was found in that. However it disappeared later on when I went for ultrasound. I am attaching my latest USG whole abdomen report which is of 6 months back for your perusal please. I want to know that can the pain be related to Gall bladder without any finding on USG whole abdomen ? Can gall bladder stones be formed within 06 months from the date on which my USG whole abdomen report was normal ? Since, my past report was normal so when should I go for repeat USG whole abdomen and what is a reasonable time within which one should go for repeat USG whole abdomen?