Not all but many people's stutter/stammer is anxiety based. There could be some stuff happening in your life that could be stressful or anxiety inducing, or you might have undergone singer kind of trauma, which could have made your stammer worse. If you think that might be the reason you can consult a psychologist/therapist to reduce stress and anxiety. In India there isn't much awareness about stammer, so It would be really tough to find a good speech therapist.