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I'm sorry I don't know what's going on with you. It's definitely not implantation bleeding because implantation should definitely occur in the 2 weeks after ovulation. It is possible to be pregnant and still have bleeding. Can you take a blood test and/or talk to your doctor?
I would also like to point out that ovulation tests don't tell you when you ovulate. They tell you when you are about to ovulate. When you get a positive you usually ovulate within 24-36 hours after the positive. You only ovulate on one day, and you need to get the swimmers in there beforehand so it sounds like your timing was pretty good. Welcome and good luck to you!