I would advise against waiting 2-3 years like other people have suggested

If it's truly making you unhappy then it's not the career for you. You can usually tell during the first year. Like during my first year of college I hated waking up early and the excessive amount of homework etc, but I really looked forward to the actual classes, made me want to get up each morning to go learn something new about stuff that I was clearly passionate about. If you don't enjoy at least some of your classes then don't wait any longer
