If I randomly just woke up sometime after a night of drinking, how likely is it that I passed out rather than just nodded off?

I had quite a lot to drink before and I was in my bed listening to music on my phone and all of a sudden I wake up and my phone is still on my bed with music playing. I never fall asleep that way. I always know when I get really sleepy and then put everything down and then get to sleep. Is it likely with that level of drunkenness that I could’ve just fallen asleep like that, or is it more likely that I passed out?