If the obstruction is not relieved in the next couple of days, then the rupture is a real possibility. First, the
cat will stop eating and drinking, then you will see
vomiting, and then your
cat will develop a very high fever. The high fever will tell you that the colon has ruptured and caused an infection. If you don't believe any of this, do the research and you will find that this info is correct.
This condition has gone too far for you to even attempt to treat this at home.