Suddenly became a heavyweight

Went to a sort of class reunion yesterday, im usually a big light weight considering im 4’9 (Filipino genes, its normal to be around that height here). But I had 3 shots of GSM Mojito , nothing yet, then I try around 3 shots of Tanduay rum, abit dizzy but it didnt do anything. Then I have 4 shots of Emperador light brandy, and I was still the most sober person there. I guess I was feeling abit less socially anxious than usual? But other than that I didnt even feel tipsy. Which sucked because I really wanted to get drunk that night cause of personal reasons.

I guess something that mightve contributed to it was last time I drank GSM, Vodka, and wine I threw up alot which is why the first few shots I felt abit nauseous and took it slow. But other than that I usually already get tipsy by 1-2 shots and drunk by 4. Does anyone know why this happened??