How long does it take to walk normally after ACL reconstruction?

I had my acl reconstruction three weeks ago, using my hamstring. If I try to walk without my crutches, I sort of walk with a limp/hobble. I am really worried that I am gonna permanently walk like this. also I have dark skin and my scar is awful, beside the scar looks bruised and wrinkled. Will my skin ever get near normal? The consultant who did the op told me they found some wear in my knee, so they had to drill little fractures in my knee for it to regrow has anyone ever heard of this. My knee feels as if it's gonna snap.