Emergency contraception

I have a pretty regulated 25 day cycle. I had sex with my boyfriend the day before I was supposed to ovulate and took emergency contraception like half an hour after the condom broke. A week later I had some light brown discharge and now i'm experiencing sore breasts and some yelllow-ish discharge. Any thoughts/oppinions on the matter? Is it too early to get tested? Do you think I could be pregnant? Let me know!