i am sorry for this upsetting situation. were you still able to take the test? if so, look at it in the grand scheme of things, no harm done. your sister is just being a nag, ignore her. the day will pass, these feelings will pass, just like a wave flowing in and overwhelming you, it will recede and all with be well again. you just have to get over the initial panic and know you are not going to drown because the wave will be gone soon. but you have been thru this many times before and made it and you can do it again. you are strong. take care.