confused

Chloe
Hi! This is my first post and I'm having all the symptoms of being pregnant, nauseous, headaches, backaches, I'm supposed to start my period on Friday and took a blue dye test tonight and it showed negative. Am I just sick or should I wait a couple days and try again? I have a nine year old son so this isn't my first time or anything but I just don't see why I've felt like crap all week...any advice would be great! Thank you!