Am I pregnant ? 5 days late now?

I'm using my boyfriends account im 15 I use Pulliut method been with him for a year. But for like 3 weeks been fatigue moody, emotional , appetite change, nausea . Nipple change . But on the 14th I started spotting it was not like a normal period it lasted a week. Barely enough to fill a panty liner a day. I have taken test and test bfn . I was supposed to start on the 22nd it's now the 27th. With all the symptoms I think I am. I had sex on a fertile day almost 4 weeks ago so . To early or what