I too had a GSV with a hiatal hernia repair AND I also take Synthroid and Omeprazole.
I began taking Omeprazole 20mg 5 years before my GSV because I did have acid reflux - and it was further suggested that I have GERD. At almost a month out... I still have Acid Reflux. Nothing has changed - Same amt of acid pours into the smaller pouch. I forgot to take my Omeprazole pill one morning and OMG did I suffer. Now that our stomachs are smaller, it is by far easier for developing gas to be pressure released upward and along with it, some stomach acid. So, I am still taking Omeprazole (as directed) and I'm "back to normal."
I strongly believe those who have had GSV and a subsequent RNY procedure AND/OR RNY or MGB out the gate do not have the same problems with acid reflux post surgery and beyond.
After two weeks, I also experienced insufficient intake and moved to soft foods. Bare in mind, you can use your food processor or your given process (your teeth) to chew chew chew chew. I moved to FF refried beans, a little bit of cheese), avocado, and Sweet Baby Jesus... if you enjoyed pudding as a kid... get some FF SF Jello Chocolate Pudding. 2, cups of FF milk (if you can tolerate milk products) and stir yourself up some yummy goodness. I have small containers and I split the batch into 4 and have two per day.
I just could not do some protracted all liquid diet without suffering dizziness, light headedness.
One thing I need to look into is if I am insulin resistant. Those who have normal levels - eat food and their system processes food and their body is able to utilize that energy more efficiently. So, that has been on my mind.
As a side note, there is a LINX device which can be implanted around the lower esophageal muscle that surrounds and closes the opening to the stomach which helps to prevent the contents of the stomach from back up into the esophagus (which is what reflux is). I know I'm a candidate for that but I don't think the surgical group that performed my procedure does the LINX procedure.
Drink, Drink, Drink... gatorade zero has helped me immensely.
Take deep breaths and you are still healing and will continue to do so for another 1.5 months. Talk to your NUT if you need encouragement to replace what you are eating with something that has a little more kick. Avocado - that does the trick for me.
Best wishes.