We don't really know when the penis stops growing. Puberty ends at 20 or so!
We can't tell when you'll get another growth spurt, but you could notice because you'll be eating more than usual! Plus, at this age and height, you're probably not going to grow much taller at all! You're pretty tall
If there's a bump in your vein, see a doctor right away! It could be a clot or something else. It's probably not normal if it's on your vein - if the bump's away from your vein and white near the base of the penis, it's probably a hair or a whitehead.
What's an N-curve?
If you go to the doctor, just tell him what you told us. He'll understand because he's a trained professional