Possible pregnancy

Sarah
Hi everyone
I'm fairly new to the app and have a question and hoping you ladies can give me some insight.  I was supposed to get my period on Monday and have not gotten it yet.  My period has been pretty regular and the app has been spot on when I'm getting it.  I took a test yesterday and it was negative and I also don't really have any symptoms that I did with my daughter.  I have an appointment on Monday just wanted to see if anyone had any advice