Just diagnosed with MRSA to nares and R foot.....

You are right to be frightened - be very frightened!
Being off of work is not due to your foot being swollen, it is due to the organism in it.
As a former Infection Control and Employee Health Nurse Public Health Nurse I am shocked that you were told "everyone has MRSA"! You should immediately report your condition (and your boss's statement) to Infection Control and only return to work when the cultures of the affected areas are reported to be negative for MRSA, after correct treatment. Remember that office "nurses" don't exist in most medical offices/ practises these days. Usually a Medical Assistant with a few months' education is there, now.
If you work in a place that is not an acute care hospital, (I suspect it is a Home Health agency) call the County Health Department and report it. MRSA is a "Reportable Disease" (unless for some reason it was taken off the list, but I doubt that).

Hopefully the diagnosis you received followed positive cultures taken of lesions before treatment. Without that, how would anyone know the infections were caused by MRSA? For heaven's sake get a doctor to treat you correctly. The place where you work should pay for that, as long as one of your patients had MRSA. If not, call OSHA! That telephone number should be posted on a visible wall space at work.

By the way, I assume you wear shoes to work. How come you sustained a nosocomial foot infection there? Did you wash your hands to 2 renditions of "Twinkle Twinkle Little Star" before removing your shoes? Shame if you didn't! Or, worse yet, did you scratch your foot somehow before washing your hands sufficiently, and of course afterward? The same preventive procedure is required when you touch/ pick your nose, which is the only way MRSA could have entered your nares!

Nice of you to let us know, too. I was pretty upset for you.

By the way, the organism you didn't have is "methacillin resistant staphylococcus aureus". I still wonder how the doctor could say it was "garden variety staphylococcus" without a culture having been taken before he treated it. Or did you have that done? To take a culture, a swab of the lesion is done with a sterile cotton tipped swab from a plastic tube, into which a liquid is released by pressing the sides of it together, then it is sent it to a lab.

MSRA is becoming more and more prevalent. Estimates of prevalence in hopsitals between 1996-1999 are 40%. That's up big from 1976-1980 where it was < 5%. Haven't seen more recent data but saying almost everyone has it may be quite realistic.