Welcome to HCM
is mostly seen in persons taking Alcohol,so I hope at least now you are not taking Alcohol.
Follow up of Pancreatitis is important so kindly follow the instructions, as far as report of USG is conceren it is OK some times due to gas present in intestines part is not seen well.
What about the blood reports Serum Amylase
and serum Lipase
levels if they are normal wait and watch policy may be suitable answer.
A CT Scan
of abdomen gives good information about Pancreas
if it can be done easily you may go for it with consultation of Gastroenterologist/GP.
Good Luck to you