Last few times drinking I’m wide awake in the middle of the night?

So for context I’m 22 so I haven’t been drinking for long but I’d say I’ve been drinking with friends since I was 20. Every time I used to drink I would literally pass out and sleep through the whole night when it was time for bed. Recently the last two times I’ve gone out and drank I go to bed, fall asleep and then like an hour later I wake up and I’m wide awake. I lay in bed for about an hour wide awake until I eventually fall asleep. Then im in and out the rest of the night. Idk why this has been happening recently. Any thoughts?