7 weeks ago, I had a derma roller (1.5mm) and stamp (2.0mm) treatment - for rejuvination and about 5 isolated mild-moderate atrophic scars on my cheeks (acne + 1 mole removal). Overall my skin feels great! However, even though I was told that results take time, I can't help but feel disappointed that I haven't seen any improvement in the scarring. Am I too impatient? Is it reasonable to hope to see improvement after my 2nd or 3rd treatment?