Hi. I Am Almost Two Weeks Late With My Period.

Hi. I am almost two weeks late with my period. Me and my boyfriend had sex days after I had my period last month so I guess it is impossible for me to get pregnant because we used a condom and it didnt broke/slip off. Im worried because I am 2 weeks late and I took a pg test a while ago the moment I woke up but the result is one red line and the other is a very very faint line. Could I be pregnant? But it's impossible because we used condoms and we did it safely...