I had a period a few days before iud removal, had it removed monday, today (wednesday) i'm spotting bright red, could that be implantation already?

Bleeding: Ovulation occurs about 14 days from the first day of your period. The actual timing is dependent upon cycle length. With 21 day cycles ovulation is on day 7; with 28 day cycles ovulation is on day 14; with 35 day cycles ovulation is on day 21. Implantation bleeding occurs 5 - 7 days after conception at about day 19 -22, assuming ovulation and conception was at day 14or 15. So, no.