ttc baby

I’m very confused and stressed about all this. I’m wondering if someone can help me out. I had unprotected sex on the 8th (this Monday) and my period is supposed to be tomorrow. I’m trying to figure out how soon or when can I take a pregnancy test? If I don’t get my period this weekend should I test or is it to early? I had light brown spotting today but not blood.

Thanks 🙏🏻