Scared

so this morning I woke up and went to the restroom and when i went wipe there was brown and light pick discharge😔 I have no cramping. I've had this with my last miscarriage at 16w. I'm scared of having an other. I'm 7w and still have yet to have a ultrasound my appt is in two weeks. should I call the Dr and see if they'll let come in for an ultrasound?