Severe heartburn
2 weeks post-op. Was very thirsty and craved watermelon. Had a glass of watermelon juice in three sittings. Was fine during evening, woke up at night with severe heartburn that still didn't go away. Was that the sugar ? I had less than 200grams which should have amounted to 10-12 grams of sugar at the most
Depending on when you drank the last part of it, it could have caused it. Especially with laying flat in bed. It wouldn't be the sugars, but the natural acid in the watermelon. I think you can take tums, see if that helps at all. Or call the clinic to see what you can take. It's lasting a long time for you.
Cathy