I had mine on the 23rd of last month, so I'm about a week behind you.
As you guessed and Bill stated, the problem with the pain seems to be in trying to go to fast. We have to eat slower, not too much at a time and not try to eat foods that aggravate the esophagus.
It's standard now for the surgeon to reach up into the chest and cut loose the esophagus from its attachments so the LES will come down into the chest. This prevents reherniation. Mine couldn't be loosened enough, so they could only do a partial wrap. But that seems to be enough to stop my reflux. It doesn't do anything for the heaving/spasms, but nothing comes back up.
The docs Rx'd Beano with every meal, Gas-X, which don't really work, and liquid Colace (take with 3 oz milk or it burns like fire!) twice a day.
I have a thread on this forum. Bill has a really long story, and there are lots of other great ones too. Read them all! They've helped me!!
With my food triggers/sensitivities/allergies, I have to be especially careful. The last 2 days I had spasms from soft scrambeled eggs. I am mostly on soft foods and liquids. Bread, even white toast is bad. Crackers, eaten slowly, go down.
The big trick is to eat every 2 hours. Liquids in between the 2 to 3 tablespoon "meals." Nothing 3 hours before bedtime, as in the past with the GERD.