Period? Or implantation..

This whole past month has been weird with different symptoms. My period has never been late, and usually heavy.. But i had a negative when my period was late 1 day.. it was late 2 days, then it started rusty brownish red color, never bled through a pad even at night. I changed often but didnt need too. But very light. It stopped after 3 days, but now im having creamy,lots of creamy, cm but its brown .. period was suppose to come april 11th, it showed up the 13th. And im still having brown creamy cm. :/ has anyone experience this?