In the event it drain is clogged, that definitely qualifies as a home repair emergency. In many cases, you cannot even use the sink or shower owed to the clogged drain, if the blockages severe enough. You ought to get it taken care of straight away.
There is also the possibility that, as well as leaving whatever is clogging the drain from the pipe for an extended period of time, you are making the situation worse. The blockage could harden and grow much more difficult to break or do away with. Additionally, depending on what the blockage is comprised of, the type of material could actually be damaging the pipes in your home the longer that they sit within.
No, the best decision is certainly to call in an emergency drain clearing plumbing company to take care of the situation once you notice that it is a problem. Though it may seem like a somewhat extravagant expense, it’s going to save money in the long run by taking care of the issue before it is deemed an even larger issue, where permanent injury to your pipes and overall plumbing may have become part of the equation when this occurs.