If you think your child may be stuttering get them to a professional as soon as you can. It’s never too early to get it checked out. For many very young children speech impediments can only last a few years or even a few months but without knowing much about your child it’s impossible to say. Generally, you should not interrupt or correct your child during a stutter. Teaching them that it needs to be corrected or is a nuisance will teach them to be frustrated when they stutter which will make it worse. Mindset is very important when dealing with a stutter. Either way, see a speech pathologist if you can, they will be able to tell you exactly what needs to be done.