nelli, i know how you are feeling...happy that your sister has given birth, low because its not happening to you, scared because you are late and dont want to get your hopes us incase your not pregnant.
the test could be wrong, then again, mother nature can be cruel and you are going to expect af.
its a waiting game as you know, if you dont have af tomorrow, perhaps you should do another test
if you are on a 30day cycle, and you tested on 31st day, it could possibly too soon.
do you have any other symptons?
have you had any tests done to see if you an dh are both fine? perhaps now would be the time to go and find out?
sometimes once af arrives, even though you will be gutted, you will pick yourself up and get on with trying for next month, but at the moment you are in limbo and dont know what to think, sometimes that can play on your emotions harder than anything..that not knowing
good luck fingers crossed that you are pregnant
xx