Teen pregnancy scare

So I couple weeks ago I was pressured by a guy 8 years older than me into having unprotected sex, (he's 25 and I'm 17) and now I'm 10 days late on my period. I'm really nervous and even though it's legal in my state I have no idea what to do or how I would even tell my parents. I can't afford a pregnancy test right now because I don't start my job until next week. Also he already has a kid. Please give me advice :(