See a doctor.
That costs money. :[ But if it somehow got serious and I get a bunch of money, I will.
In the UK its free. It seems very mediaeval to me that a person would be denied healthcare on the basis of personal wealth.
A stutter can be for all kinds of reasons. I got one at uni because I was smoking half an ounce of pot every week for 5 years. I left uni, stopped the drugs and the stammer went away after about 5-6 years. Yeah, that long. Mine was more of a pause as my brain searched for a word. I guess it had some kind of neural path damage and my brain needed to make new connections which took a while.
However, you can also develop speech issues because of tumours.
In rare cases, stuttering may be acquired in adulthood as the result of a neurological event such as a head injury, tumour, stroke, or drug use. The stuttering has different characteristics from its developmental equivalent: it tends to be limited to part-word or sound repetitions, and is associated with a relative lack of anxiety and secondary stuttering behaviors
In short, it could be symptomatic of something much more serious. Ask you parents for doctor money.