Hello

So, I was supposed to get my period (I am regular, and usually really heavy) on November 2nd. Instead, a brown discharge was released instead of my usual blood. Shall I describe it to you? It's dry with clumpy jelly-like brown stuff. I thought it could have been my period so I put on my pad and it's still continuing with the brown discharge (today is November 6th). It's enough discharge to use one pad (It doesn't fill the whole pad, I just use it so that it doesn't stain my panties.) I have been sexually active, but my boyfriend doesn't like to go inside me and when he does he uses condoms. Last time we had intercourse he had a condom on, and didn't even cum inside me (he pulled out because he prefers jobs and wanted to climax twenty minutes later on the top half of my body.) 

So I was wondering, is this brown discharge really just old blood that my body is getting rid of? Do you think there's a small chance I am prego?Is this normal? Infection?  

I am 18 years old, unemployed, and would get killed if my parents knew I was sexually active, so is there a place I could go for cheap treatment? 

Thank You.