thank you asking HCM
I have gone through your medical concerns, and I am sorry for the situation you are in.Lactulose
is given in constipated patients, but it can make strong bowel spasms
that are pain full. it will pass , don't worry.
you should give the lactulose time to work,
if this pain continue more than 24 hours than you can go to ER.
you should take 2- 3 litters of fluids/ day, be careful with diet,
it's important take foods reach in fibers.
I hope be helpful