My Period Has Been Really Weird The Last 3 Month.

My period has been really weird the last 3 month. In June I missed my period and took a pregnacy test and it was postive then 2 days later a starte to bleed and took another and it was negitive a week later, last month it was 8 days late but started and was kind lighter than usual this month it was 4 days long and lighter than normal, and the past two months I randomly have cramps throughout the day and have been expericing pregnacy symptoms, could I be pregnant?