Brown discharge.

I have brown discharge. I'm 14 weeks and 5 days pregnant. It's mainly there in the morning. I've had spotting but I listen for the baby's heartbeat everyday and I find it no problem. I haven't had sex or anything since becoming pregnant. I have an OB appt on the 20th so I will ask. I'm just wondering if anyone else has ever had this and be alright? I've already called and got the "There's nothing we can do because your not 24 weeks yet." Again. No problems hearing or finding the baby's heartbeat. Just brown (old blood discharge). A little red every now and then.