Ladies! -5 days past AF

I have taken 3 tests in the last week and all have been negative. First was before my period, the other on the day of period and It was a digital and was blank, so I took it apart and then I took one 3 days after my expected period, a first Response, and it was negative.

Today I am 5 days late. I started a new diet last month and I started doing yoga once a week. Could that make my period almost a week late?

Also my husband and I had sex during my fertile time, and we did it twice. So I’m just getting curious to see what’s going on. Anyone else had this happen?

Whatever the results are, I’m fine with being pregnant or not. Just trying to figure it out. I hate not knowing.