missed period negative test

I'm getting so frustrated like I'm letting my fiance down... I'm 5 days late on my period so today means I missed my whole period. yesterday and the day before I took pregnancy test both were negative 😔 for the last week I've felt like I was going to be getting my period lots of cramping, but nothing. not stressed out just so curious to what's going on with my body. God will bless me. just need advice....