Implantation or period

hi everyone. I had a normal period in May. (Although 3 days late) but it came. Had intercourse 21-24th daily and then I got a light period 3 days early. Didn’t have bleeding at night, just day and one pad would of easy contained the flow. But my periods are never really heavy. But I cannot remember for the life of me I’d it was a dark brown, pink or red blood. What I’m wondering is, was this implantation or just a period. I am pregnant but not sure how far gone I am. I also had sex 3 days after period but restarted bc on the last day of my period and 9 days later and then 18 days all after my period. Bc should of covered me for the later days but can’t help wonder when I should go by!! And help greatly appreciated