Implantation Bleeding?

So last night I THINK I got what looks like implantation bleeding. I saw pink tinged CM when wiping, nothing bloody or thick. I'm not due for AF until Thursday 1/25, and if my period ever comes early it's never more than a day or two at most...never almost a week early! I ovulated on either 1/10 (wed) or 1/11 (Thurs) so I guess this would be the right time for me to experience implantation bleeding if that's what it is. My question is, how long should I wait to test? Of course I'm dying to test now but don't want to disappoint myself with a negative result.