do i need to let my mother decide what i am going to be in teh future?

Maybe this depends on the culture of your country too. In my country you can decide almost every studying thing by yourself.

Simply put, your problem is whether you should obey your mom. Indeed, life is about choices, and every choice that we make has its corresponding consequences. In your particular situation, you have to know what's more important to you--following your heart's desire or obeying your mother's order. In trying to make the right choice, try to carefully look at your options. Your mother, to be sure, only wants what is best for you. You may find her actions too intrusive, if not dictatorial, but give her the benefit of the doubt. Her age probably gives her the wisdom to know what's going to be good or bad for you. After all, I feel that your mother would not make you do something that would, in the end, be bad for you, right? You also have to consider the effect of not following the order of your mother. As you've said, she's threatening to stop sending you allowance if you do not follow her. Judging by her actions, it seems that she truly wants you to take the course that she wants for you. Would you be able to survive on your own, without your mother's support? However, try to assess your mother's threat. Does she really go that far just to achieve what she wants? Does she really have what it takes to carry out her threat or is it just an empty one? Is she really capable of neglecting you and leaving you to survive on your own? Now, try to look at your other choice. There's a saying that there are two critically crucial choices in life--your partner for life and your career. Your choice, of course, to be sure, will prepare you for the career that you want to embark on in life. It will be your preparation for the world and the life that you want to live in the future. Your choice of career, in a sense, will define your destiny. Given these, do you want your mother to, in essence, decide your destiny for you? I feel that your mother truly loves you. She probably has the greatest of plans for you. She perhaps nurtured and brought you up well. But sometimes, she must know when to stop controlling your life and start giving you the respect to decide for yourself, since your future and probably even your whole life are at stake. Crossing the rubicon is really hard, especially since all odds seem to be against you. I know that you're having a difficult time deciding, given that you probably don't want to disappoint your mother and perhaps cut your allowance. However, sooner or later, you must decide. It's inescapable. As I've said, life is all about choices and its accompanying consequences. You have to deal with it. If it's of any help, though, try to envision yourself 10 years from now. How do you see yourself? Do you like what you see? If you do, do you think that the course that your mom wants you to take would lead you to what you envision? If not, just a word of advice, take the risk. Try to talk to your mother and reveal your heart, bare your soul, if possible, to make her realize how important this decision is for you. Surely, your mother will likely be disappointed but it's a risk worth taking, especially since it's your heart's desire which is on the line here. If you will only follow what you truly want, then it is highly likely that you will not regret it in the future. In the end, life is too short to be wasted on something that you do not want to do. Be strong, have no fear, just follow your heart and, hopefully, your mother would humbly respect your decision. Just hope for the best and expect the worst.

The question is.. Can you live without your allowance? If it's not something you really want to do and it can in no way benefit you in the future, then I wouldn't take the course. Another question is.. will she really not send you your allowance? Or is she just threatening you. A lot of times my mom would threaten me with things but never go through with them. Especially if she knew it would hurt me in the long run.. like taking my money supply.