If you really want too ctb your stuff does not matter sinces you do not exist in this world anymore, but sinces you sound unsurer, i would highly recommend that you do not just ctb, sinces we have our up and down, and just like mood swing, its just something you feel in a time period. Im not trying too say that you should seek help, but what can like your parents do if you tell them you are going to sucide, even though in worst case they can lock you up if you really want to ctb, you will be able to do it. Like every room has a window that can easier can be break, so escape would be very easy.