Implantation or weird period?

Based on my app my period came a week early. Its been very weird my period usually last between 5-7 days and i only cramp during day 1 and 2. The first day it was a very light color and alottt of clear stretchy discharge and ive have left pelvic pain. Whenever i wipe its very light in color and on the pad its been dark and today is day 4 and ive been cramping off and on and its brown with a little red and when i wipe its very light red almost pink. Anyone else experience anything like this?