At the 7th day post op, it is totally normal to have some swallowing problems. Actually, it's so early in your recovery that it would be normal to have lots of swallowing problems. Did you get a chance to read my recovery journal? I gave you the link in my first post.
Actually your swallowing will get gradually worse over the next week as your wrap becomes more and more swollen. Then at 14 days (peak swelling) things will start to get better.
You should definitely stay away from bread. Soft bread is one of the last things you will be able to eat. It is impossible to chew it until it turns to a liquid (that's what you should be doing--takingn small bites and chewing whatever you eat until it is liquid.)
Many people are still on liquids at your stage of recovery. I started solids at Day 6, but my surgeon told me to stay away from bread and steak for a long time. When I asked him when most people are able to handle those, he said probably at around 8 weeks.
If you want bread, toast it well, and you will then be able to chew it to a liquid.
It's very likely that when you drink water or juice it's being held up at the wrap site and doesn't all get through into your stomach. Actually if I drink water quickly even now (nearly 3 years post op) I can feel it building up at the wrap site, and can feel it draining down slowly. That's just one of the things we deal with in order to live without the acid problems we had before surgery.
As far as pyrosis...it's normal to have some heartburn/pyrosis feelings at this point in your healing. Your esophagus can't tell the difference between pain and heartburn, so when it feels pain it says to your brain, "Heartburn!"
Also, while your new wrap is healing it may not be laying flat and it's possible that some acid sneaks through. Many of us continue to take anti-acid medication (PPIs) while our wrap is healing, to keep things more comfortable.
I you get a chance, read my recovery journal. It might give you an idea of what to expect in the next couple of weeks. You don't need a BRAVO test...you're healing. It's far too soon to need that!
Hang in there...give yourself some time to heal.