tightening/heavy feeling in chest..

Ca

Not sure if it's really pregnancy related or not and I'll for sure be bringing it up to my doctor but the last few days I'll get this random tightening/heavy feeling in my chest. it'll come at any time of the day or night no matter if I'm up doing things or simply laying in bed scrolling through Facebook. it almost feels like an anxiety attack but I'm not having one. I'm 38 weeks and 5 days, has this happened to anyone else?