Implantation or maybe a period? Confused!

So the last 2 days I had a very light pinkish discharge that was a little bit watery. At first it only happened when I wiped after peeing then just a little bit on a panty liner. Now today is day number 3 and its more brownish and pinkish but still really light. I have a little cramping but not like when I get a period. Need some insight on this. And how long should I wait to take a test incase this is implantation? Please help.