Wisdom teeth and a broken molar removal

[Apl]

I’m having my wisdom teeth removed and a broken molar removed I think it’s #2. The oral surgeon told me one of my wisdom teeth is actually 2 fused together and that there’s a 80% chance that he will have to do an additional surgery to the sinus cavity floor because the tooth is protruding into it. I’m terrified. Is it really that bad? And he also mentioned he bottom right wisdom tooth is impacted and on the nerve or something like that.