Well DANG! I'm sorry to hear of this!

The very first thing that came to mind is: Have you stopped taking heavy pain meds since getting the SCS? Some of what you describe almost sounds like withdrawl. I'm still in the process of titrating off the Fentanyl Patch...I'm now down to the 25's.
But I've noticed when I tried quitting too suddenly, I'd get this aweful ....clammy, sweaty feeling.....

If you don't feel this pertains to you, then ....
Are you in pain? How about Fever? If you are without those two symptoms, that would be a good sign you do NOT have an infection.

Certain meds (esp Cymbalta triggered alot of sweating in me).....

And of course there will be the wonderful smiling Dr's who will look you in the eye and sayyyy "...hmmmmm you may be at 'THAT' age....."

PLEASE let us know what you find out!

I'm still trying to get used to a few things about the SCS......it's been over a month and still I have yet to get my first 'tweek' session.

FEVER would be the #1 thing that would point to infection......and pain/redness/swelling at the incision sites.
I pray this is NOT the case for you!!

Prayerfully,
Rae