Can’t get drunk?

I am so confused as to why I haven’t been able to get drunk recently. I have a crazy high tolerance but I know what can get me drunk. The past 3 times I’ve been drinking I noticed that what would normally be enough alcohol for me to feel good, I can’t feel A THING. And no I don’t drink a lot, I actually barely drink now so I would think my tolerance would be lower. I usually take straight shots of vodka as my tolerance is so high that that is the easiest and fastest way for me feel something. Should I switch alcohols and see if that does anything? I’m genuinely so confused and kinda frustrated lol. Can anyone help at all?