Did I accidentally make alcohol?

I’m not too much into sugary drinks so I always order water when I go to a restaurant. There’s one exception tho, Pomegranate Arizona Tea. I live for that shit. I went to a Korean fast food restaurant with a friend and I got that drink but I didn’t finish it so I took it home in hopes I’d finish it the next day. Forgot to put it in the fridge and now it’s been sitting on my desk for a couple of weeks. I opened it to throw away the contents and I heard a pzzt sound, which shouldn’t happen because it’s not a carbonated drink. I smelled it and it smells strongly of wine, and upon taking a small sip I can clearly taste the alcohol. Is it possible that I made an alcoholic drink out of a really sugary processed tea? If so, is it safe for me to drink or should I still get rid of it? I don’t usually like alcohol but it’s so subtle that I quite enjoy the taste of it tbh…