Hi,
I would explain that your symptoms could be related to different causes: 
- the 
difficulty breathing could be related to pleuritis, pericarditis, 
heart failure or a lung disorder
- the numbness in the feet could be related to 
peripheral neuropathy. 
For this reason, I would recommend consulting with your doctor for a physical exam and some tests: 
-  a chest X ray study and respiratory function tests
- a resting ECG and cardiac ultrasound- some blood lab tests (
complete blood count, PCR, sedimentation rate, blood electrolytes, kidney and liver function tests, vitamin B12 plasma levels, HbA1C, fasting glucose)
- a 
nerve conduction study for neuropathy
You should discuss with your doctor on the above issues. 
Hope to have been helpful. Let me know if I can assist you further.
Kind regards,
Dr. Aida