Painfull lump under arm?

I have had a lump under my arm for the past week now. I was going to schedule a dr's appt but then it started to go down...well now its the size of a golf ball and not only that but Im feeling sick (not sure if its related). I've been running a low grade fever for 2 days now and my throat feels like I swallowed a handful on sand. I have tried self treating, I've punctured it, lubed it up with meds, and washed it with peroxide I am a single mother of 3 so my finances are beyond tight right now (too tight for the dr)...anyone have any advice other then the obvious?