Looks like you have viral fever. There could be dehydration or electrolyte imbalance which can be responsible for low blood pressure and generalized weakness. Undernutrition is also another possibility.
Next Steps
please book an oine telemedicine consultation with me to get this issue investigated and rectified as early as possible.
drink green coconut water or lime juice or ORS frequently to maintain total daily fluid intake of 2.5 litres
Health Tips
Do not try home remedies or any self medication for this.