Need advice, can someone explain?

Wasn’t sure how to ask or word this, but I need advice from anyone who’s maybe experienced something similar to this.

So in the past, I have experienced withdrawals that I had to be hospitalized for. Currently, this doesn’t feel like that. For the past 3 days I’ve had a few tallboys + a bottle of wine and I’m not experiencing withdrawal or anything, but my body just feels fucking exhausted. I haven’t been getting super drunk or anything but the best thing I can describe it as is it feels like I haven’t slept in days. I’m currently 30 but I still booze it like im 23, but is this what older people mean when they say the hangovers get worse as you age? Im very confused atm. This amount of liquor in the past would’ve been “light work” but currently it has me feeling wreckeddd..