I am sorry about this... Most people in the current scenario with symptoms as yours possibly have covid... It is thus advisable that you do a covid test at the earliest to be on the safer side...
Next Steps
Get an RT-PCR test done for yourself and for your family members too if they are having similar issues
Health Tips
Keep yourself well hydrated
Drink lots of hot fluids
Steam inhalation can help you to a certain extent
Usage of plain saline nasal drops can help with the nose blockage