Any advice?

My period finished up 4 days ago. The last two days were nothing but brown blood and for two days after I slightly spotted brown and my cm was tinged. I'm still cramping and honestly feel pregnant. My hpt says otherwise. I'm cramping now and have a constant cramp in my right side. I am prone to cysts but they normal hurt above my hip bone and this cramp is below the hip bone. Is it an ectopic preg or did I ovulate early and its implanting? There is no bleeding and hasn't been in Two days.