I am a Marketing Manager for a chemical company and a part of my job is traveling to tradeshows. I have 3 coming up in the next few months and am just about 6 weeks along. One of the shows is in Dallas and the other two are in Vegas! - I would be ~11 weeks at the Vegas ones and am worried about the smokey casinos. I've been to Vegas lots of times and know that they pump a lot of air into the casinos but being at a tradeshow where I need to wine and dine customers is making me worried. I haven't told my boss or coworkers I'm preggs yet. Am I being paranoid about being around all the smoke??