Loss of pregnancy symptom

I’m week 7 now had nausea, tiredness and sore breasts last 2-3 weeks but this morning I woke up and the soreness is gone. There are 2 little spots of brown discharge on my underwear but when I wiped there nothing. Should I be worried? I’m also not as tired as I was last few weeks.. have I miscarried ? :( My ultrasound at week 6 was normal saw the fetus in the sac and the flickering of the heart. Gynae said to visit him again at week 8