I have just turned 21 and am still hoping on growing more. I've been told males grow until they are 25 in some cases so I am still hopeful for that reason. My mom is about my height, whereas my dad is like 5 inches taller sill so for that I thought I should be taller. But my biggest concern is my hands and feet, the digits are smaller then many people and as a guy my hands should be larger then women generally but they are in smaller compared to most girls. My nails also don't have the 'white cresset' that many people's nails have and that I attribute to them not growing large also. My skin also feels different then what others seem to have, in that I feel like I have excess skin in some areas that would have no reason to be stretched out since I didn't lose weight or anything. The skin aspect might not be anything but I’m not sure.
Since I was younger I have cracked my knuckles on my hands and feet, and my knees and elbows crack naturally, same with my spine and hips to a point, everywhere it seems. I don't know if this would have contributed to a stunted growth to a point, I've never heard that could have an effect on growth. What I am wondering then is if anyone might know of a reason for my 'problem', if it is actually a problem or not, perhaps my body was designed to grow this way, I don't know. I'm wondering if cracking the knuckles would have any negative effects on me. And finally at my age, if there is anything I can do about this to help me grow to what I believe I should.