Hi,
The only thing that can cause most of your symptoms is anxiety.
Because you get these shakiness of body and
chest pain at night, presence of
dizziness and
tiredness with body pains very likely you are having all these due to anxiety.
I would recommend you to talk to your doctor and see the possibility of being examined for anxiety and taking treatment and also the possibility for counseling.
Being active and trying to exercise regularly, going for walks and trying to do things you like and not allowing over-timing, having friends you can trust and share are all important as well.
Your doctor may choose to do some tests first to rule out other conditions like TSH to rule out
thyroid problems or EEG if you lose your consciousness with the episodes of shakiness and a general metabolic profile (lipids, fasting sugar,
creatinine and electrolytes, ALT, AST, CBC and ERS) to make sure you are otherwise doing well.
Hope I have answered your query. Let me know if I can assist you further.