My girlfriend left me after I burped during sex.

So me (18M) and my girlfriend (18F) had a long day out, and were just laying on the bed after chaning n eating a bit. After a while, things started heating up when i went and started kissing her lightly as she was watching reelss, soft kissses turned into wet ones,and slowly after that she too was enjoying it. We took our clothes off and she got on me and we'd started making out heavily, and then started having sex, as it went on, the tacobell i had earlier had gassed me up a bit and i was holding it in for a while, but as and when i was about to finish and she was enjoying herself, i got off the bed ran to the farther corner of the room and asked her to look at me and i cupped my armed around my mouth like a blow horn and burped looking up in the air like a Barbarian,and she was looking at me and as i burped the look on her face turned from curious to scared and disgusted. She pulled her legs close to her, wore her tshirt and shorts and left the sheets we were in, sulking succumbly in the corner of the bed, i tried asking her to get in the sheets and she didnt speak anything, she just closed her eyes and turned her back at me and slept. I wore my clothes, tried to talk to her but she didnt reply so i too slept. I woke up in the morning to my door unlocked and she had left with her things, she wasnt replying to my messages or my calls, and i have my flight back to my city tomorrow...
What do i do...?