Hi My Name Is Ashley I'm 19 I've Been Off

Hi my name is Ashley I'm 19 I've been off birth control for since May of this year and I've had 4 day periods and spot for three days. After all the way up til November 8th I started and I bleed like I normal period for three and spotted on and off for two days and I started December 8th and bled for two days and spotted on and off for two day I took a pregnancy test and it was negative but. Last thurs and Friday I discharged just a little bit it was white and thin and I haven't had anymore discharge since then.what's wrong