please take a look!!!

juju

Guy’s is this accurate? my last period started on nov 18 and it’s says that my next period is dec 19 but until now i dont have period but i took a preg test on last wednesday but its nothing its negative. But i have extremely cramps and lower back pain and mild breast pain and i have yellowish discharge is that mean that my period is coming or what? i am so stress lately till now. thankyou guys for answering