Was it too soon for me to mention sex in this situation?

I started to communicate with the guy I like. We have been planning an actually date and we recently talked about hanging out for New Year’s Eve and having a few drinks. The only thing that made me want to set boundaries and mention sex is the fact that I know when two people who like each other and are attracted to each other are together and you add liquor and being drunk, sex could happen. All I told him was that I know what that could possibly lead to and that I don’t mind drinking and hanging out but I still want to get to know him better before it leads to that. I can’t help but to believe maybe he wasn’t even thinking about sex and now thinks I’m being desperate or overthinking or assuming that he wants me in that way. When actually I was just playing it as safe as I can.

Was it too soon for me to mention sex in this situation?
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