NEED HELP ON NY CYCLE

So I need some help on DPO and implantion 

So from the 24-2-15 to 28-2-15 I tested high fertility on CBlue digital then forgot to test on the 1-3-15 so I tested on the 2nd and got peak day solid smile that was the Tuesday 

5/6 days past ovulation maybe I don't know on Sunday night after sex I had allot of brown stuff when wiping and Monday more brown streaks down stairs with heavy breast am backache on Monday night and I had pain in my lower abdom that night. 

What I want to know how many DPO I'm i and does that sound like symptoms