I think it’s the bloat that’s making you feel uncomfortable. Haha. As you move along your pregnancy journey it may be worse after meals. Maybe try to eat smaller meals and have small snacks in between if you’re hungry instead of a full meal?
do more stretches and move around more often. week 12 is still quite early, it’ll get harder and feel more physically arduous as your pregnancy progresses. good to practise more stretching now