Congestion may be due to nose blockage or lung involvement.
Headache may be due to sinusitis or eye refraction.
Feeling cold may be due to hypothyroidism
Suggestions as follows
Warm water and salt gargling 3 times daily
Steam inhalation twice a day .
Please get your BP,
Thyroid profile and refraction tested.
Till then Tab.Paracetamol 500mg sos
Next Steps
Please connect for further advise on practo