Implantation questions

So I found out I was pregnant at 8-9dpo. I had spotting at 3 weeks 3 days pregnant (9dpo) and cramping 3 weeks 4 days-some now. The spotting stopped and the cramping subsided. Does that mean it was implantation cramp/ spotting?? I read on some sites how implantation doesn’t happen until week 4. Kinda worried because I had two miscarriages April and June. I’m on progesterone and baby aspirin.