So, I am officially 5 days late on my cycle. Today would have been the last day. I am never late and my cycles are like clock work. I took a Clear Blue test today and got a BFN.... I have very light spotting as of today (this evening.)

What could be going on?

I have been eating healthy and only drinking water and have not been stressed whatsoever and no super strenuous physical activity.

Does anyone have any helpful insight?