My advice in three words . . .
See a doc.
(Thank you, thank you. No applause, just money.)
Seriousy, Jazzman, get real - you're 20 years old, bro! And many guys at 20 are still growing. Their height can still increase, their body hair may just coming in at some places, and other changes may be taking place that are part of a continuing puberty process. The fact that you were on a cycle - and yes, you are too young to be doing a cycle - may be irrelevant; the growth would probably have occurred anyway.
As for the coarse hands, I recommend less masturbation. Alright, I'll give you a serious answer . . . One thing you didn't discuss as your workout routine, if any (and I hope you have a routine if you have done a cycle). If you are fairly new to lifting, it is natural that your hands will develop callouses. If you are experiencing something other than a normal callous, then examine any other possible causes. (For example, do you work with chemicals or solvents on a regular basis, to which you might be having an allergic reaction?) It is unlikely that a substance taken internally (such as an AS) would cause such a localized reaction.
My advice: See a dermatologist. He or she will be able to diagnose anything affecting your hands more competently than a general physician, and will also be qualified to comment on your growth patterns, which sound fairly normal to me. But realize that as much as we'd like to advise you and give you a magic cure, it takes a medical professional who can examine you in person to make the right diagnosis.