38 weeks and 2 days pregnant, help please..

Rachel • 28 Mommy of 1 beautiful boy 💕😍👶🏼 and a beautiful girl!! 💕 mama to a angel baby in heaven 👼🏻trying to conceive my rainbow baby 🌈🥺😭
Hi ladies ! I am currently 38 weeks and 2 days pregnant, I had an appointment yesterday and I am 2cm and baby is head down. And everything was fine , but since about 2pm yesterday I've had a achy pain on the top of my stomach/uterus , then last night it moved to the middle of my chest then my upper right breast. I didn't sleep at all, and it was making me feel kind of nauseated. And now it's in the middle of my chest and right side of my chest/shoulder. What could this be 😩I haven't eaten since yesterday . Anything I can do to relieve this?! I don't think it's heart burn considering its on my right side and it hasn't stopped hurting:( thanks for your feed back ladies .