Actually striking a balance between school and business is really stressful and sometimes very complicated but some people found themselves into because they have no other option. you most be stressed and to some extent there will be no absolute achievement of one.
Actually planning is very good and it will helped you get yourself out of stress sometimes but definitely somedays things may be complicated and you will have to denied the other to achieved one.You have to know that this is definitely something that is not easy in order to pull out. This is why I will advise that you should always create a clear timetable on how you think things will be.