How many inches could I grow in College?

I’m 17 years old and I’m about 5’10 now. My parents are about 5’5 5’6 each; the reason I probably reached this height was because of my Grandfather who was about 6’0 6’1, also my Aunt is 6’2 and my Uncle is about 6’1. I want to be honest about my diet so I’m going to include anything that should be known so I can get the best answers. First I will tell you I have a poor diet, I eat a lot of junk food, I don’t play any sports, and I don’t exercise or stretch much. Also, I stress a lot(which i hear could effect growth). I’ve also heard of people who grew 3–4 inches in college. If I work on improving my diet and exercising more do you think i could grow 2–3 inches in college before I turn 21?