stitch in side?

Jessica • currently pregnant with our rainbow! due november 1 2017. yours mine and ours, this makes number 5! ❤️

so I had my baby shower tonight and while I was there I got a terrible stitch in my side. it felt like someone was stabbing me in the side. literally so bad I couldn't talk through it. I'd say it was there for a good 15-20 minutes on and off. has anyone had this before? I'll be 35 weeks on Wednesday and I'm high risk due to polyhydramnios (high fluids) plus I've called the on call and I'm just waiting for a call back. it all feels fine now, but curious if anyone has ever experienced this before?