Is 400ml of vodka over 8 hours a lot to drink?

I went to the pub from 4pm and left the bar just before 12. I worked out in that time I had drunk 400ml or vodka. Don’t get me wrong I was very drunk but I wasn’t paralytic drunk or messy drunk and I remember everything just the standard non stop chatting. Is this an excessive amount to drink over the space of 8 hours? I believe it’s just over a 35cl bottle of vodka. I am just worried I was more drunk than I thought due to the anxiety after drinking ( anxiety and alcohol doesn’t go well I know this and shouldn’t of drunk) even though I remembered everything I was doing.