Good day ? Has anyone experienced this?

Good day ? Has anyone experienced this? I'm lying in bed, with tension + open 1 finger. I was discharged after two days. But today my stomach started to ache again all day. They told me to lie down and not worry. All tests are normal, ultrasound is normal. I don't know why it's aching. The doctors aren't saying anything. Maybe someone has experienced this too? I still have to work for another week before maternity leave.