Pregnant? Implantation?

Hi,

I had a period Sept. 4-Sept. 14, on Tuesday I had a sharp pelvic pain that ended up going away in about 15 mins and then followed with light pink bleeding/discharge the next day. I did realize that I had brown discharge prior to today and on top of that my boobs have been hurting for the past 1-2 weeks.

Last night/this morning I had cramps as well as chills and my nipples were extremely sensitive. Today I've been cramping all day and around 1pm I used the restroom for the second time and noticed this but haven't had any bleeding