Pregnancy scare

Hello, i(f18) just recently started to engage in sex, me and my partner do use condoms every time and im not aware of any rips or incidents but GOD my period should start today but so far all im getting is brown discharge(it is not a new thing, i for most of my life had irregular period's and just recetly i went a half year without it, but after my first time it finally came back) this should be the second one.Me being extremely anxious it was only matter of time before i started to google, and from what i read brown discharge could mean early pregnancy.I do have all premenstrual symptoms but again....some sources say that could be a sign too (im spiriling and too afraid of getting a pregnancy test should i wait mabey a day or so? It's eating me alive for the last three days)