What would you do?

I'm going to be 12 dpo tomorrow and I'm trying to decide whether to test or not. I have a stupid test calling my name under the bathroom sink! The thing is we only had intercourse on cycle day 8 and based on CM I ovulated on day 12 or 13 (more likely 13). I know it's possible to get pregnant from intercourse 4-5 days before O, but fairly unlikely. I feel like I should just wait for my period but I have that damn test and for some reason a little bit of hope that I probably shouldn't have!