im 18 am i done growing taller? My mom is 5'4 and my dad is 5'9.?

i'm 18 and a half years old and i am 5'11 and a half. From 16-17 i grew from 5'7-5'8 and then from 17-18 i grew from 5'8-5'11.5. I'm taller than my dad Who is 5'9. I have 3 grandparents who are all over 6 feet. Am i done growing since i turned 18 or can i grow a bit more since i recently started growing alot. thanks