I need help ladies

Hello everybody , ill try to make it short. The first picture is from 1/31/2017 the other two are my cycle I try to keep up wit every feeling or sexual intercourse ttc ! 1-2 I bleed but can't remember if it was heavy because I used a tampon thinking it was af. On the 3rd I had brown spotting when I wiped . Since I been cramping backache really bad headaches, stomach was super bloated . Well on my calendar I was suppose to have af 14-16 really 13-16 but it never came so Idk if it was af or implantation .I feel pregnant but maybe because I want to be. Took test all negative so I don't know if I'm really late or af was 1-2 or its coming in march . Help would be greatly appreciated 👶👶👶