I've had an indented scar on the middle of my nose for 4 years. It happened from falling outside and hitting my nose. A couple years ago I tried 3 sessions of microneedling but it didn't seem to help. A doctor suggested a filler, but I read those are risky on the nose. Would any topical treatments such as retinoids help? Should I try microneedling again? I don't want to waste more money.