Spotting but too early?... HELP !

So me and my boyfriend had sex on August 7th and august 8th and both times he came in me, I was ovulating, it’s only been a week and 4 days since but I’ve had spotting a little bit. The thing is I was supposed to get my period on the 16th, and today is the 18th. I went too the bathroom and when I wiped it was a light pink thin watery color that I saw. Is it possible I could still be pregnant? I’ve taken a test yesterday and their was a very faint line.. too early to tell.