Passive smoking

So I am 5-6 weeks pregnant, and I went to a friends get together tonight. Everyone was smoking there on and off, (it’s not their fault at all) I tried to move out of the room a few times to avoid passive smoking but I must have inhaled a good amount. Since I am very early, so nobody in the group knows that I am pregnant. I did sit in that room for good 2 hours. Will this harm my baby? I feel so stupid, never going to go to such scenes until I tell people.