implantation or no!

shameka
Hello guys i had my last cycle May 20th to the 24th and i was suppose to have came on my cycle on the 17th of this month according to my app..On the 16th i got brown bleeding light for two days and stopped and now i have light brown and pinkish discharge with clear mucus. The ER tested negative with urine test. could i be pregnant or is it too early to tell