confused

So af ended on Saturday when I was on cd 5. Since cd 7 when I took my first ovulation test for this cycle I have been getting positives. I've been taking one in the morning and one at night and they have been coming back positive and I have been having brown discharge since af ended on Saturday. I know it's old blood but this isn't normal for me. Usually on cd 5 af is done and I don't see any sings of her until next time. I also usually don't get a positive opk until cd 17-19. Has anyone ever been in a similar situation? I'm confused on what my body is doing and I'm worried that this cycle will be out for ttc since it's going so weird.