Stomach pain, today two chapters in the evening

It's not that I have a stomach ache now, it's last night, I was woken up by a stomach ache at five o'clock in the middle of the night when I sleep at a normal time, it hurts to lie down, and I can bear it when I sit, and it doesn't ease until about seven o'clock in the morning, and then I'm really sleepy, and I ended up sleeping until now, and the two chapters are at night...... Didn't I eat hot pot yesterday, eat ice cream, and eat supper with watermelon before going to bed, I haven't had a stomach ache for several years...... (To be continued.) )