Scared and confussed 😕

Im 3 weeks and 3 days and have had one miscarriage at 4 weeks and 3 days. I started bleeding just a little bit and decided to wear a pantie liner just to keep track of the bleeding/spotting. It was mostly brownish and pink when i wiped. If this implantation bleeding or am i going through this nightmare again. It only lasted about and hour and a half, and stopped, then turned back to that white-ish discharge.