Help! What do you see??

So I took 3 pregnancy tests. All of them I believe are negative. The last one I took at 8 days late according to this app. I am now 15 days late. I always use a condom when having sex and on birth control.

Is my period just late because of my birth control? It's just never happened before.

Do I need to take another test?? Or am I really not pregnant??

(I do not wish to be pregnant)