7 weeks postpartum, no period yet. Could I be pregnant?

I completely stopped bleeding around 3 weeks pp and started having sex using only the pullout method at 2 weeks pp. Once he was 'unsure' if he got any in me. I spotted light pink at 4/5ish weeks pp only when I wiped I thought I was starting my period or my pp bleeding was starting up again but it stopped after a day

Could I be pregnant again this soon? I had a csection and I'm formula feeding

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