Flying causing contractions??

Brooklyn

I flew on a plane for a family vacation at 28 weeks and my first flight was done but then my second flight after my layover was really difficult. When the pilot went to land he kept banking the plane and I started to get a lot of pressure and back pain and my stomach was getting really hard. It felt like contractions but I’m a FTM so I’m not sure. I’m suppose to fly again for my baby shower at 30 weeks but getting really anxious. I don’t want to cancel but if my baby is at risk then I will.