Brief Answer:
Anxiety is the cause of difficulty breathing.

Detailed Answer:
Hello dear, welcome to Ask a doctor's service.
I read your query and here is my advice.

I think the difficulty breathing and tight chest may be related to anxiety.
You can firstly try to calm yourself doing breathing exercises and going out to get fresh air. Also get distracted from bad thoughts keeping yourself occupied.
We usually prescribe alprazolam for anxiety but it is prescription only.
Also vagostabyl is another a herbal product that can help with anxiety and can be found without a prescription.
If you have one of these drugs or any other things that doctor has prescribed for you,take them.


Hope I have answered the question.
Let me know if I can assist you further.

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