Dear lina,
I have read your letter and I am realy moved by the situation in which you find yourself.Well,but don't worry.As you know there is at least a solution for any problem and your problem may have several solutions and I'll suggest one to you.
You told me that you would sit for the Baccalaureat exam and that your parents were old and needed financial help.You know that parents all over the world wish the best for their children and they never stand in their way of success.On the contrary,they often do their best to facilitate things for their them to lead them to success.Don't worry,I won't tell you to abandon your parents but why don't you study and prepare yourself for the Baccalaureat exam and have a part time job to help your parents and even when you pass your exam and go to university you can continue having a part time job and in this case you will persue your studies and help your parents at the same time? This is my point of view.If you like it , let me know so that I will tell you more details about it .
I wish you would get rid of this problem soon
My best wishes
Yours faithfully