Hello,
In my opinion, we should definitely rule out heart and lung diseases for your breathing difficulty.
So consult a doctor and get done blood pressure monitoring, ECG, 2d echo and
stress test (trade mill test).
Also, get done a chest x-ray and PFT (Pulmonary Function Test) to rule out lung diseases.
If all these are normal then no need to worry for major heart and lung diseases.
Since you are going through a lot of stress, this can also cause breathing difficulty.
To avoid stress and tension, be relax and calm. Don't worry, you will be alright but the first rule out heart and lung diseases.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Kaushal Bhavsar, Pulmonologist