Oh dear, how horrible. I don't like this time of year for this reason. :( Just keep washing your hands and hopefully your escape it. touching your mouth or eyes or nose with hands with the flu bug on it is by far the biggest way of catching it. far more so than from the carrier sneezing or coughing.
Really hope your little one recovers quickly, chidlren always seem to bounce back so fast. You most certainly don't want it on top of your morning sickness. Sending you healthy vibes 
xx