What are the chances of me having twins?

Okay so my great grandma had two sets of fraternal twins a boy/girl and boy/boy and one of the boy twins from the boy/boy set of twins was my grandpa , he ended up not having twins since twins run in mothers side, but he had my mom and she had me and my twin brother ( btw im a girl) what are the chances of me having twins? Do i have a higger chance of having twins since twins run in mothers side and i have a twin brother?? Also do i have a chance of having two sets of twins since my great grandma had 2 sets twins or was it just luck?