College life is the single brutal thing in life of most stutterers. I went through it. It spoiled my grades and everyday I was thinking when to finish the college. Fast forward now I'm 42 , I'm least bothered about stutterering ,developed a habit of stubborness and super hero kind of thinking ,equipped the skills to perform my job. Stutterering is one the bottom things to worry in my life. Don't worry ,please admit that you stutter to the staff openly. In India, it's really really tough to win over this defect and succeed at 21. It takes time but you will be later successor in life but you will overtake your friends or classmates later on in life in money and skills, but never ever fear. Success is coming little later but life long success is coming. Be happy my friend