Vomiting during labour

Flora • Gracie Amelia Mary, due 21st Aug 2016, arrived 23rd Aug 2016 💖👶🏼
Apologies in advance for the gross-ness of this question! 
I am emetophobic (phobia of vomiting) and I am almost 38 weeks pregnant. Do any of you have any tips on how to reduce the chances of throwing up during labour? I've heard it's quite common and the thought of it is making me having panic attacks every day.
 I am going to try to talk to my midwife about it, but she doesn't seem bothered about any question/queries that I have.