I need help!

Well hi everyone I'm new in this , so I have to many questions my fiancé and I we are trying to have a baby this year so my Last period start in June 26 to 30 and we have sex on the 3 and 4 July because of his work is hard to have every day well this month my period suppose to be on July 24 but nothing happens I took a pregnancy test because I want to know I you know start taking care my self and everything this is my result I take this one 3 day before my missing period

I see a very faint line I'm not sure but then I take another one on the 24 and nothing comes out can someone explain to my why thank you so much 🙁