I am sorry, this is really tough. I lost my dad at 14, it was definitely a traumatic event. Our bodies do funny things to help us go through stuff like that. I wouldn't be too concerned about the stuttering, be gentle with yourself, you are going through a really rough time, allow yourself to be different during this time. I know this can feel frustrating, but stuttering is actually not such a bad response given what you are going through, and it only happened last Thursday!! I know this really hard, but I promise you it will get better. I am 32 and I grew up to be a very strong and loving person. Take care