My grandmother had Huntington’s

Hello everyone, At first sorry for my English, it’s not my first language, but I am trying my best. Writing this post because I am getting extremely anxious. My grandmother and my uncle both had Huntington’s and both died at about same age (42-43 years old) because of it. As far as I know they were also getting physical symptoms at about same age(~30 y.o.) I didn’t know my grandmother so don’t know a lot about her , but my uncle was always little bit awkward, aggressive some time etc. My father just got tested, so we are waiting for the results and it’s freakin me out. Good thing is that right now he is 48 years old and no symptoms at all , very extrovert person , calm and friendly. Another thing is that few months ago I started noticing that I am twitching a lot ( I am 28 ), and it really scares me :( don’t know if that’s the symptom or not .. Basically my question is : what are chances that he has less cag that his mother ( looks like she had a lot, if she died young ) and that’s why he still has no symptoms or anything, but I have more than him ?

Update: he diced to get tested because I was constantly crying and worried about twitching :(

Thanks a lot in advance!