From the details provided,its clear that you had sinusitis
as well as impacted wisdom teeth which you got extracted.
Check whether the extracted socket has healed completely or not.
IF not,consult your surgeon and get the socket examined.
Root pieces if remaining has to be extracted and socket has to be curetted well.
Take complete course of antibiotics as well as analgesics.
Gargle frequently using warm saline or betadine
Avoid stressful jobs.
If symptoms persists,please do visit an ENT specialist
and get treated if sinusitis occurs.
Hope this helps.