Alcohol tolerance for no reason?

I havent drank in 2 weeks, and im halfway through a (750ml) bottle of soft spirits (20%)

Im not feeling tipsy at all, and usually rn id be well on my way to being drunk.

Im 183cm 66 kg, workout 6 times a week.

Is it time to move onto harder spirits to get drunk? I dont really drink but when i do i like to get really drunk. Go anywhere from 2-6 weeks between outings due to work.