I need some help, I'm so lost

It's now 5 days after my period was suppose to come... my cycles have always been regular and only the last one I had was not.

I took a blood pregnancy test the day after my period was suppose to start and it came back negative. The three-four days leading to that I did 3 tests all spread out. Each came out with a vvvfl...

I'm so confused. Any opinions?