Implantation or period ?

Been TTC for about 4 months now , I was supposed to start my period 3/22/18 and on 3/14/18 I had spotting only when I wiped the next day 3/15/18 it was a bit heavier to where I put a pad on but didn’t soak and the blood was really bright red/pink 3/16/18 was the same and by 3/17/18 and 3/18/18 it went back to spotting and showed up only when I wipe . Today I don’t have any spotting or leaking I can stay w out a pad or anything on but when I wipe there’s something and it’s like brownish . Picture below of today. Please help ... my periods are NEVER early .