5 days late

Samantha

So my period is five days late and today I woke up with a little bit of pink when I wipe. It is now 130 in the afternoon I sat down to use the toilet at work and a waterfall of blood came out. Is this just my period starting late? I have been having symptoms that don’t match my typical PMS like frequent urination tender breasts and nipples and cramping on my left side that feels like a pulling sensation for nearly 3 weeks but any test I’ve taken says negative. Any ideas ladies? Thanks 😘