Help! Stomachache!

Last night right before bed I had a cheeseburger and fries, and then I went to straight to bed bc I have work today. This was around 11 pm last night. And at around 4 am I woke up with a really horrible stomachache. It was so bad that it woke me up and I couldn't go back to bed. My stomach feels super heavy like if there's bricks in there. It's now 9 am and I still have it. I also did go #2 already and it didn't seem to help. Any idea what it could be? I've been very stressed lately, and i eat very light during the day (fruits, salads). Any remedies? I never get stomachaches 😢