食べ過ぎ･胃もたれ

overeat/eat too much/gorge

gorge　/gɔːdʒ/　/gɔːrdʒ/　n)峡谷　v)詰まらせる、食べ物をがつがつと詰め込む

upset stomach/sit(feel) heavy on(in) my stomach

As I am getting older, I have an upset stomach after eating too much.

Because of my age, food sits heavy on my stomach after overeating.

ついつい食べてしまう

I overate again. When am I gonna be able to control myself.

I tend to eat more than enough.

I tend to overeat mindlessly/unintentionally.

intentionally     adj)意図して･故意に