I also dont want to come across the wrong way, but for your height, your goal isnt healthy hun.. may i ask how old you are? i fear that youre at a young, impressionable and vulnerable age, who is still growing and maturing..a lot of damage can be done through dieting.
i would advise that you seek help from your doctor or nurse practitioner who can help you,may even give you one to one support from a counsellor or can refer you to someone who can help with you with your feelings towards your body and how you see yourself.
please take me words as kindness and visit your doctor.
xoxo