Quit posting on a forum and go to the doctor, YOU WILL NOT GET IN ANY LEGAL TROUBLE, the doctors are concerned about your safety, not your decisions.
The doc will most likely just give you some antibiotics if you get there soon though, the longer you wait the worse it will get. Soak in warm water a few times a day will help a little bit, but will not fix the problem. If you even think its an abscess, get it looked at ASAP rather than ignore it and lose an arm.