I am so sorry to hear you lost your dad. In 2015 i lost my father of sudden heart attack. I was 57 years old. I have an identical twin sister, we both developed a stutter within days of losing him. I happens .... here i am 10 years later and the only time i stutter is when i get stressed or feel under pressure. Give you mind, body and soul all the time it needs. You will find your way through. Sending love and strength from the UK ❤