It may be that you were getting some spasms at the lower esophagus. Who knows? Still at your early stage of recovery pretty much anything is possible. That clear slimy mucous I believe is a reaction to the irritation of the esophagus. Wow, that gets old. I remember I got a ton of it on Day 4 of recovery. It's especially bad because every swallow at that stage is very uncomfortable.
I agree that you ought to swear off red wine for a while longer. Those types of set-backs are temporary, and you'll be back to your old self soon. You might want to stick to the PPI a little longer into your recovery. Your stomach has been through a lot, and the last thing it needs now is an extra onslaught of acid as it heals. Remember that your wrap is made of your stomach, and it will react in the same way. I happen to have a very sensitive stomach, hence my wrap is very sensitive as well.
The exercise is great, but anything that hurts should be halted at this point. Keep that walking going...even at a very high speed if you can tolerate it. Eventually, you'll be back to jogging...and you'll be able to enjoy it without having that nasty reflux washing up with every step.
Thanks for sharing your recovery experience. While everybody is different, it is still providing a great example of what a recovery might look like in the early stages.
Good luck with your eating in the future! When you do decide to go to solids, be sure to choose only those that can be chewed to a COMPLETE liquid. Tiny bites, and chew, chew, chew! We should write a song about it!