Late period 7 days negative results

Hoping someone can give me some reassurance or help!

As you can see from photos my period is late by about a week. I have been having mild nausea at night and in the morning but not sick. Over the last few days I have been having feelings like af is coming but only lasts about 1 min then I feel fine and no sign of af. I normally get really painful breast before period but nothing this month!

I am very regular day 27 for the last 8 months.

I took a test this morning and saw two lines at about 1 min in but then it faded and it’s a solid 1 line now, can anyone say they have experienced the same?