So worried

So I have been spotting on and off since 5 weeks currently 6 weeks 5 days. Most of the time it's just off colored mucus type spotting but today it started out pink and then turned brown. I am also experiencing some cramps. I was trying not to stress since my appt is Monday.... But I sent my dr. a message anyways and they ended up calling me right away and they want me to go get labs drawn in the morning. I feel like I have failed this baby some how. I didn't have any problems with my first pregnancy and I'm just so worried. My husband is trying to stay positive for me but I'm just so upset. :( hoping everything is okay