Upper abdominal pain when eating?

Today was my 5th encounter with upper abdominal pain while eating. I'm 38 weeks and 3 days and this started almost 2 weeks ago. I have an anterior placenta located where the discomfort is but a nurse on the hotline didnt think the two are connected. I tend to eat my meals normally fast but it's never bothered me before and it only bothers me with late breakfast and lunch/late lunch meals. Not big snacks or supper. It's not heartburn or anything else so I'm just wondering if anyone else has had this?