Hello, is there a reason to worry? I was admitted to the hospital with…

Hello, is there a reason to worry? I was admitted to the hospital with severe constipation, by evening the issue resolved but an ultrasound revealed hydronephrosis of the kidneys, anyone experienced this? There are no problems with urination, according to the ultrasound everything is fine with the baby. But the uterus is in spasm and they won't release me from the hospital.