More Fraxel to Fix Fraxel Damage?

I had fraxel done & they did skin needling to increase effectiveness. They used tatoo needle and now, (7 weeks post) I have a lot of deep scarring - some resemble deep acne pits, some scars are long wide and deep. Returned to Dr. and he injected small amount of silicon in depressed scars & suggested more fraxel & more silicon as needed to lift scars.Now I'm reading more about silicon and am frightened I will have problems with silicon. Am I better off just trying to correct with fraxel? Can I even have fraxel with this? Can I utilize another filler instead of silicon now?? Can I utilize a dermaroller and try to correct damage that way vs. filler or fraxel? Please, please help before I make another mistake!