Jim, obviously the human element factors into these guidelines, what I was getting at with the symptoms for two days is that you shouldn't wait for symptoms to become acute before looking for care, which was, I think, something that Berigan referred to. Hey, I advocate getting attention right away, just not firstly at the ER if possible. I am not taking a company line on seeking care, just use common sense (getting advice on when to seek medical attention at a Jazz forum might not qualfy ). Also, if you have a doctor worth his salt, and you describe the symptoms as you did, and he or she doesn't refer you to the ER if they can't see you right away, then, again, you probably should get a new Dr.
On a related note, I personally would seek immediate attention if I had a bug bite of unknown origin, particularly if I lived in a Lyme disease endemic area, which I do. I have a 16 year old son who has been unable to attend school for 5 years due to a case of Lyme disease that went undiagnosed for, we believe, about a year.