Is having a drink everyday after work a problem?

I (24M) work overnights from 5:30pm to bout 4am in a ford manufacturing factory. And just about everyday i get home, if im not too tired and just go to bed, will usually crack open a beer or make myself a rum and coke. I really don’t feel like i overdo it. If we get sent home early i might have 2-3 beers or 2 rum and cokes while i relax and play games or watch TV before bed. I never saw it as a problem until both my girlfriend and my mother started saying it’s a bit excessive. Just something nice i like to do for myself when i get home to relax. But now im starting to second guess myself. What do yall think?