I've Recently Turned 20 Years Old And I'm 5'6 1/2.

I've recently turned 20 years old and i'm 5'6 1/2. I started puberty at about 14 at 5'3-5'4, and I haven't grown at all since junior year in high school. Is it possible that i could have only grown 2-3 inches during puberty!? or could i be a late bloomer? My mother is 5'5 and my father is 5'7. My predicted height was between 5'9-5'10, could that have been stunted by anything as to where i haven't reached my full potential? My older brother is 5'7 and my younger brother is only 14 and already 5'11!! he's predicted to grow to about 6'3. 90% of my uncles on my father's side are above 6 feet. What would you say is the probability is that I'm a late bloomer and could have one more growth spurt?