When to Test

Hello, I have PCOS so I really don’t know when was the last time I ovulated. Honestly the last time I got my period was back in July. But I had sex on Valentines with my s/o. This morning I got super Happy because I saw a little bit of blood on my panties. I showered, then put a pad on. 6 hours later I had only bled about 2 more drops and that’s it. Blood wasn’t bright red it was more on the brownish/light pink side. I’m wondering if it’s possible it could be implantation bleeding? I have no other symptoms rather than just a little bit of cramping today. And I am also wondering if I test tomorrow, if anything would come up?