Pregancy

Hi, my period is few days late. I am DPO 12days , usually I feel when my period is coming . but this time I do not have any symptoms. I noticed I have unusual white discharge and my urine is very yellowish. I am taking Pregnacare for few months as well and they can change my urine but since my period is late this time its different. I used OPK this month. Any chance to be pregnant ? Pregnancy test was negative.