Did it have the consistency of like blood from a broken blood vessel (abrasion, broken hymen) ? Or was it more like menstrual blood? If you're not sure, talk to your doctor.
Do be aware that in between periods some women leak a little bit ("spotting"). There are many reasons why a woman might be spotting. Here's one web page with some info, but I still encourage you to mention this to your doctor:
Bleeding Between Periods - Why Bleeding or Spotting Between Periods Occurs