I was three weeks late for my period. (I started today) during the three weeks I did four pregnancy tests as for he last six months I’ve been perfectly on time with my period. Two of them came as negative and the other two gave me an uncertain on malcfunctioned result. During the lead up to my period I’ve had nausea and vomiting, tender breasts and a funny taste in my mouth. I know that negative results can be inaccurate, so could I be pregnant? My period is very light.