Implantation Bleeding?

Hi all.

So to make a very long story short, I had sex a little over 2 weeks ago (September 29) and now I'm concerned that I'm showing signs of pregnancy. One being potential implantation bleeding, which brings me to my question. For any of you who had implantation bleeding when getting pregnant, how long did it last and how heavy or light was it? What color was the blood? If anyone could help me out that would be amazing because I'm a little freaked out right now. If you need me to clarify anything, please let me know and I'll answer back!