Period a week late, BFN???

Igor
Over the last year? My period finally sorted itself out and got onto a normal 31-day cycle. I'm 7 days late. I tested last week and got a BFN. I'm trying to get my car back so I can go buy another test soon but all of my symptoms fit for pregnancy. I'm just quite stressed out due to the late period... if I'm pregnant, I don't know what to do because the child's father left me 2 days ago... I have to have money for gas to get my car going when i get it back, and if I get gas, i won't have test money :/