No worries. If you haven't already, we encourage you to search your inbox for any past emails from EventSprout, our ticketing provider. Our emails often end up in the SPAM (or Promotions folder for those with Gmail), therefore we recommend looking there. This is the quickest way to find your original confirmation email.
You can also resend your confirmation email (which contains your ticket) at anytime here. Be sure to use the email that your tickets were purchased using.