Period or not??? Implantation bleeding?

chibime1
Ok so glow says I'm supposed to start tomorrow...I have been starting though normally on the 24th of every month. This month on the 24th I had some spotting it was brown but only when I wiped. The 25th I got only twice some light/bright red(only when wiped) the rest of the time it was brown no tampon or pad even needed it lasted for about 3 days of just brown discharge. I haven't had any cramps I have been feeling neaous off and on, really irritable and have been having headaches. .. I took 2 prego test both negative. Did I possibly have my period or implantation bleeding? My body feels different..we are ttc for our 2nd. Any info on implantation bleeding would be helpful! =)