Notary of Public Question and Accidently Signed?

Hi. I have to sign an oath for the USPTO and get it notarized. I only have on copy of it. I accidently signed and dated it before I saw I needed to get it notarized. All notaries are closed today (that I know of) since it's Sunday. Can I take it to the notary and sign again in front of them? I don't know what to do since I messed up.