Reverse Nissen fundoplication outcomes

Hi,
I had a Nissen Fundoplication operation in April 2010 for reflux however still experiencing excessive bloating/gas pain in combo with cronic (chronic) stomache pain with digestion whether I eat or dont eat pain still continues... Have been experiencing constipation even though I've been monitoring what I eat to ensure balance diet. I've also gained excessive weight like 20kg since the operation even though I don't eat much-very bizzare??? Has anyone experienced above symptoms or have had the nissen fundoplication reveresed.

[cmp1825]

have you had your throid checked? Weight gain and constipation are quite common with hypothyroidism