Help ! this is so confusing

Janny
Ok sooo ! I'm on BC and I know chances of getting pregnant is low but still ! Anyway my period was suppose to be here yesterday but mia so I took a pregnancy test and as usual it's negative . BUT I took a look at the test an hour later and a very light positive line appears and I freak. Then this morning my period came , not spotting , medium amount . Am I still pregnant ? ( stupid q I know , sorry !!) 
So anyone know what's going one about the test? I had sex on June 23 and test July 4 . It's too soon but still , I was so confuse