Your stomach has been through a lot. It sounds like you're having a weekly dumping episode. Does your stomach gurgle a lot on the day you're having the diarrhea? I had occasional dumping/diarrhea during my recovery. At the year mark, I was still getting it very occasionally, and decided it would probably be a "quirk" that I'd always have to live with. However, sometime during the second year I suddenly realized I wasn't having the problem any more.
This healing process is a long-term one. You don't really need to worry about being on a PPI at this point. Once you've healed, you can go off it without any problem. You might want to see if you can get a script for 20mg, and see if that's sufficient to make you comfortable as you heal.
Hang in there...it takes a full 6 months for most of the healing and a year for the rest. As you can see, in my case it took over a year!
Nissen Fundoplication 2/09
"Whatever you fight, you strengthen, and what you resist, persists.”
“Worry pretends to be necessary but serves no useful purpose”
“Accept - then act. Whatever the present moment contains, accept it as if you had chosen it. Always work with it, not against it.”