I went to clip dd's toenails today and I noticed it was cracked right down the center! it must have gotten snagged or something

I clipped it as short as I could but now I don't know what else I can do! It doesn't look infected but should I put a band-aid on it? Or a sock to make sure it doesn't get worse? I can tell it irritates her when shes getting on all fours because she kind of digs her feet into the ground to get up and she fusses during the process.
Re: Broken toenail