Need advice ASAP.. I had a mucus discharge today, but it wasn't like the months before.. It was…

Need advice ASAP.. I had a mucus discharge today, but it wasn't like the months before.. It was brown, and like a dark blood color. I usually have one every month about a week before my period, but it's like a clear white cloudy color. I'm not even sure if "mucus discharge" is the right wording but I don't know how else to explain it. And I'm currently trying to get pregnant.