Am I pregnant or not?!

Shelby
So today I am 8 days late on my period. I have a tiny bit of cramps here and there. No sign of blood anywhere. Boob sensitivity. I have all the signs of pregnancy but it's also the same for a period. I'm very confused. I took pregnancy test and they all say negative. I have an appointment with my doctor in 2 days. Is this normal? Or am I just dying?