Poor sleep together with gastric discomfort in someone overweight often points to acid reflux disturbing your sleep, sometimes along with a breathing issue like sleep apnea that goes with the extra weight. The two problems often feed each other, since lying down worsens reflux and poor sleep makes digestion worse.
Next Steps
Try an early light dinner finished 2 to 3 hours before bed, and sleep with your head slightly raised. Please see a general physician, who can examine you and decide if a sleep study or acid-reducing medicine would help.
Health Tips
See a doctor soon if you snore loudly, gasp for breath at night, or feel very breathless during the day.