8 days late & confused?

Okay, so I'm 8 days late for my period, I've tested multiple times and I've gotten vvvvvery faint lines on blue dye tests and negatives on others. I've felt weird the past few days & I have none of my normal signs of AF. I know stress could play a role in this but my stress levels are no different than normal. I've had spotting a week before AF was due, weird stomach pains for a day or two after, back pain, nausea & headaches around lunch time daily, sore boobs, and a drastic change in my normal appetite.

Has this happened to anyone?! Did anyone end up pregnant with all of these crazy symptoms or just end up with their period?

I'd really like some feedback so I don't drive myself crazy thinking something is wrong with me.