Fetal pole of 85

Hi everyone - the last few weeks have been a whirl wind - long story short i thought i was about two weeks ahead of what i am and have been having brown spotting consistently since finding out i was pregnant. Today i was measuring exactly 6 weeks which was good growth since my ultrasound last week but they detected the fetal pole of only 85 bpm. The tech did say this was low and she wants to see me again next week to make sure everything is still going as it should. With being already two weeks off and now this, I’m in a constant worry that miscarriage is imminent. My son had a heart rate of 125 at this point in my last pregnancy. Anyone have Little’s who started out with a low bpm but turned out okay?