Yellow/brown discharge 10dpo

I'm freaking out! I don't know if this is implantation bleeding or just discharge. It was definitely a yellowy color. Almost brown. I don't have any itching and it doesn't have a smell. I wouldn't necessarily say it was spotting because it was so light. I'm worried it could be af. I think I had "implantation" 2 days ago because my bbt dipped and rose again. How long does implantation take? Uuuuggghh