im scaredd

IDK if im pregnant or not on my period app it says im supposed to get my period tom 10/28/18 and its been 4 weeks since my last period and me and my bf had sex the 14th during my fertile window he pulled out but i think some dripped down u know and now i woke up and i saw a little blood on my underwear not enough for my usual period and no cramps or heavy blood will i get my period tomorrow heavier? or is this that irregular light pregnancy bleeding i can mistake for my period bc i got it around the time im supposed to get my period PLEASEE HELPP my family is hispanic and crazy n judgemental and im scared my bf doesnt have a job rn i have a seasonal job for right now im in school and struggling at home with parents they stress me out too much and dont pay anything for me anymore except classes and like food i dont know what to do my friend is bringing me a couple pregnancy test on monday the 29th i guess ill see😭😭 i need advice though