Do bleeding and brown discharge during pregnancy indicate it is ectopic?

Hi doctor,

I am six weeks pregnant, this will be my second baby, my first delivery was normal. Last week I had some pain in my lower abdomen. I also had slight bleeding and brown discharge as well. I also visited the doctor. She did an ultrasound and some blood test. The ultrasound report says that uterus is seen gravid with a single viable fetus with regular cardiac pulsations. CRL is 0.3 inch corresponding to six days. EDD according to fetal measures is six days. Average cervical canal length and internal OS caliber at the time of examination. I have read certain articles about ectopic pregnancy. I am scared if my symptoms are leading to this problem. Can you please help?