I want to correct it.

The phrase that comes to mind in times like this is... I should have done it earlier.

I wish I had done it when I was young, no matter what year it was.

I wouldn't be having these worries right now.

Every time I smile, I get nervous, so I always cover my mouth with my hand when I laugh... Maybe because I'm always worried, it's hard for me to smile openly... If I had done it earlier, I could now show my neat teeth and smile brightly.

I wonder if I should do it now.