Brown bleeding after period.

My period is normally on point when it comes and leaves. Back in 2007, i had 15 cancerous cells removed via a leep. I've been experiencing cramping in my stomach and lower abdominal area, plus back pain...which has been on going for a week now. Also a light bleeding of brown discharge which never happens. I haven't had sex since Nov 2014. Im worried it's cancerous or i don't know What else it could be. Doctor can't get me in until june 3rd, what to do?