With the symptoms, you describe you should be further investigated to diagnose the cause of breathlessness, fever, and cough.
It can be a seasonal upper respiratory tract infection caused by seasonal flu.
But with lots of cases of COVID 19, it is essential you should consult your primary care physician for further testing like
Complete Blood Counts, CRP
X-Ray/ CT scan Chest.
If COVID 19 cases are present in your area the doctor may send you to swab for testing as well.
In the meantime, Do steam inhalation and saline gargles.
You should take the nasal saline spray.
You should take Ibuprofen and Nyquil/Claritin.
You should hydrate yourself with warm liquids.
You should start a multivitamin supplement and vitamin C lozenges.
Take OTC Robitussin DM for a cough.
Use a humidifier in your room.
Let me know if you have any further query so we can discuss it thoroughly in every aspect.
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