Can i be pregnant?!?!?!?

I'm not suppose to start my cycle until the 30th but i started bleeding yesterday but then it completely.i am active with my boyfriend . I'm really not freaked out i just want to know .and at the moment i can't afford a home pregnancy test i know there only like $10-15 but that's how tight our budget is .Please no if you cant afford a pregnancy test then you cant afford a baby .I have a job interview this Monday so we will be fine in a month or so .Thank you