hello and welcome to HCM,
You must be complemented on tolerating so much pain, if you are saying that you have such a huge abscess
as your fist then when it bursts it would have been extremely painful.
Although you are doing everything right you need to definitely start an antibiotic therapy as soon as possible which can also be initiated by the pus culture and sensitivity.
If the pain is severe then you need to start injectable medications also
After the infection subsides you need to be investigated further to find out the cause and give you a permanent relief
take care and get well soon
Dr Sriram Nathan