Brown spotting

I had a miscarriage in December got pregnant my 3rd cycle. I started spitting brown Thursday it was darker brown after having intercourse. I had an ultrasound Friday which showed a sac with a fetal pole I haven't gotten the results back yet if it's viable or not and the ultrasound tech said nothing the whole time. I have had brown speckles in the discharge that have lightened up and is barely there now anyone have this and have a viable pregnancy.