Don't go there girl...don't start obsessing over scars that you hadn't noticed before! Been there, done that.
The filler didn't last long at all for me. I had Juvederm followed by Restalyne a month later the first time, Perlane the second time. Within 3 weeks, gone.
As for the subcision, it may have made a small difference (maybe 10%) but I don't think it's worth the money I spent.
I'm now doing Profractional spot treatments.