I need advice/guidance SOMETHING

I'm 5 days late today! I'm super exited!!! Yesterday I took a test and it was negative..... I don't want to take another one to see another negative... so what do I do? Just wait ? 
I'm cramping like a period but have had 0 blood. I am always spot on when my period is suppose to come. 
The only thing that worries me is jet lag. I traveled to Europe from California June 4-10th. Was suppose to start my period on the 17th. Would jet lag cause me to be this late ?????