Hi, welcome to HCM.
You are suffering from severe sinusitis
. The loud sound after blow is due to mucus filled sinuses
If you can't go to doctor, then start steam inhalation 3 times a day.
You can also take cetrizine
10 mg tablet at night. If having fever
then take paracetamol
Viral sinusitis shoud be relieved in 4- 5 days. If it persists then you have to consult physician and need to take antibiotics.
Hope I have answered your query.