The best answer I can give without more info is 'probably'. It sounds like you subscribed to our channel awhile ago. If that's the case, whatever account the subscription is on will have the coolest of subscriber badges when the subscriber loyalty icons launch ~next week ;). If you have access to whatever account it would have been linked to, you can go to twitch.tv/day9tv and see if you're subscribed in the top right of the page.
If you don't have access to an account that's subscribed, your best bet is to unsubscribe and resubscribe using whatever Twitch account you use these days.
Also if you're around when Day is streaming live I highly suggest hopping into the stream and saying hi in chat. The community is a very friendly place :)