Welcome to the GERD Forum! You are definitely in the right place. So sorry to hear you've been suffering so long, and can't seem to get a good diagnosis from the docs you've seen. Hopefully your endoscopy will be helpful in that regard, and you'll soon be on the road to recovery.
You can be thankful that you can swallow food comfortably. There are several members here who have had to had their esophagus dialated in order to swallow properly. That's a positive!
Since you had inflammation when you had your first endoscopy, it'll be interesting for you to see if it has improved with the treatment you've received. Keep in mind that just because you can't feel heartburn symptoms when you're sleeping doesn't mean you're not getting some. Quite a few people get what's called "silent GERD", when they have reflux without the classic heartburn symptoms.
This is a very active forum, and there are lots of experienced members who post here. I'm confident that you'll get some helpful responses. This site was a godsend for me when I was trying to make the decision as to whether or not I should have the Nissen Fundoplication surgery.
Best of luck in your quest to find an answer to your problems.