Chest tightness

I recently returned to the US from living and traveling in Southeast Asia for the past 8 months.  I saw several doctors while I was in both Thailand and Japan as I have been experiencing a mild (dull) but constant chest pain/tightness.  

I was previously told that I had GERD by multiple doctors and was given prescriptions to take for this - I was taking PPI's (Omezaprole) for about 10 days and Gaviscon liquid, Air X tabs, though I was never actually tested for it.  It didn't seem to help or change things much for those 10 days.  Now I haven't been experiencing heartburn so much, but I feel this tightness in my chest mostly on the right side but sometimes it moves to the left.  It almost feels like it is a muscular pain (could this still be reflux?) - and I have felt a sore back/arm as well (comes and goes).  My throat was feeling much better, but now I am starting to feel wheezy and have a mild dry coughagain.  I feel a cracking in my chest and throat sometimes when I breathe as well.

I experience the chest feeling constantly throughout the day.  It's not painful really, but its generally just there.  I have not experienced any breathlessness.  I was sick with a bacterial infection previous to this which lasted 2 weeks before finally going away so I thought that could have been related.  I have had a chest X-ray and my breathing tested - doc said it is fine, ECG was also fine.  

Does this still seem like it is GERD?  It feels like something else, though I do have many of the symptoms of GERD.  If so, I don't understand why the medication has not really helped it, and I feel it not due to eating but throughout the day.  I just returned from traveling and I'm recovering from jet lag.  I felt like it was getting better, but after the plane ride and not getting enough sleep things seem to be getting worse again.  

I'm 23 y/o female and I'm generally very healthy - don't get sick much or have many health problems generally so this has gotten me very anxious and has consumed my thoughts recently.  I have wondered if the anxiety of it has made me feel things are worse.  It just generally feels like a consistent pressure and things aren't really getting worse, but they are not improving. I am waiting for my health insurance plan, so I can't see a doctor yet but I was wondering if these symptoms seem normal for this condition or if anyone has any other input. 

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