12 days late for period! needs advice!?

Okay so I'm 12 days late on my period I went and had a blood test done on Tuesday n they called me the next day n it was negative she said I tested too soon! But my are sore and my are larger the bumps around my are larger n some are white! I'm very gy but constipated I'm having really bad indeguestion I'm always tired and I almost ped out the other day bc I felt very dizzy I just started felling nauseated I'm just very confused we used the pull out method and I know we should have used protection but. Any advice would be great thanks