Is this normal?

Hello, I’m F 24 and I’m 4’11”. I got a breathalyzer for fun and decided to use it the next time I drank. I’ve been drinking while cleaning my bedroom over the last 4 hours and I’m 3/4 finished a 2L of 7% pineapple juice. The breathalyzer says I’m at BAC 0.20. Google says normally this is when black out occurs. I know I can drink 2 times what I drank tonight before blacking out. I feel tipsy but not to the point where I am uncoordinated or blacking out. I have, however, been a heavy drinker in the past and I do currently have a higher alcohol tolerance because I have 1 glass of wine after work every day. Is it normal to feel only tipsy at a 0.20BAC level?