Welcome to health care magic
I can understand your situation. I appreciate your effort to seek online support.
Regarding fever, consult a general physician first and get your routine lab investigations done to rule out any medical illness.
However, as per your details, you are possibly having underlying anxiety/depression. For this consult a psychiatrist
for detailed evaluation. Following treatment strategies would be helpful-
1) Antidepressants like SSRIs (escitalopram, sertarline, paroxetine etc)
2) Psychotherapy/ Counselling
3) Relaxation techniques
like yoga, meditation
, deep breathing etc
Hope it helps
Dr. Gourav Monga