Hi ladies, really stupid question (in fact it's probably a bit embarrassing!), but I work in the city and park at a multi-storey car park. The car fumes are really bad in the car park and I often have to hold my breath (sometimes up to around 20 seconds or so) because I'm paranoid about breathing in the fumes. Same when I come across a group of smokers!! Is it bad for the baby to hold your breath in for too long? This suddenly occurred to me and I thought I might be doing some sort of damage and starving it of oxygen. I feel this is a silly question but I'm going through that stage where I'm anxious about everything that I'm doing may be potentially dangerous.