what should we do if we have all the symptoms of...

Treatment for your case
first of all you must specify that you are connected with other corona pt or not and you must nowconnected with or call specilized medical units to do investigation 
now you  just stay in your home and care about wearing your mask and wasching your hand many time and so you must supply your immunity with good nutrition and with getting enough eat fruit and vegetbels
Investigations to do
 you must do rt-pcr for corona virus
You can ask for CBC to see the level of WBCs which increased in inflammation and infections of respiratory system so you can call with specilized medical units
how corona virus transmmit
ther is probapility to transmmited with hug and with kissing and sneezing and touch so we prefer all people made social spasing
my advise
We recommend to conact with medical team  to keep you safe