I have a very regular cycle every month , i was suppose to get my period the 27-28th of august so im 5-6 days late and still no sign of it ,  ive been having cramps and backache for two weeks now  the same symptoms I typically get before my period starts . Today i did a pregnancy test and it was negative however, now I am noticing some light pink spotting and brown discharge  Is this the sign of my period or is this another sign of pregnancy? I hope im not pregnant because im only 21 and not ready for a baby 😞😞😞