How long until persistent redness after co2 laser goes away? It's been 6 months- please help!

I'm 23, olive skin and had non-fractional co2 laser performed on my face for acne scarring. It been 6 months to date and i am still very pink/red (blotchy). The doc told me I'm a "slow healer".How much longer for the redness to go away??? Will it ever?Please help. I been extremely diligent with sunscreen, vitamins, drinking plenty of water.