thanks for sharing your concern.
yes you are right. you must seek a dentist
help in this regard.
your history suggests that you have decayed(cavity)teeth in your mouth,which upon infection has developed periapical abscess
.this abscess is causing you immense pressure and pain.
abscess anywhere in the oral cavity should be drained as soon as possible ,followed by a course of antibiotic and analgesics.
meanwhile you can take tab combiflam
500 mg every six hourly for three days for your pain,till you visit your dentist.
A thorough clinical examination,followed by a diagnostic x ray
is required and then based upon that your treatment can be planned.
meanwhile follow good oral hygiene
hope it helps