Hi My Name Is Shay And Today I Went To

Hi my name is shay and today i went to the dollar store and got me a pregnacy test because i have been feeling kick sensations. I took it and it showed up negative, later on in today my vagina produced this milky white substance and i am concerned about it. I have been on nexplanon for about six months. I got it in the begining of febuary and im just concerned about the milky white discharge. Could i be pregnant? If not what signs can i get if pregnant on implanon?