Spotting in pregnancy

Found out I was pregnant Tuesday and had my hcg checked Thursday and they said my hcg was at a 17.0 but I spotted on Wednesday (the day in between) but today is the day of my expected period and I just wiped a tiny tiny bit of blood so little it was hard to see unless you like studied it.. should I be worried since I’ve spotted twice already? I’m only 4 weeks and like 3 days