Smudge tool might do it to a level, if you just go with the noise de speckle option it will blur your image even more.
WHAT YOU SEE IS WHAT YOU GET
Separate Hue/sat adjustments on face vs for background.
PS - Why are you limiting yourself to such a poor quality starting point? After all, it's a picture of yourself -- you can take as many pix of yourself as you need to get the lighting, camera adjustments, image size exactly what you need.
then again, you could remove background and the head in foreground.........just thinking
Maybe a couple unsharpen masks?
I agree with Tomm Mann.. if it is your image... why dont you shoot with a good quality camera... no matter how many masks you apply, how many filters u use, the basic image quality would not be comparable to that of a Good quality camera shot.