My last menstrual date was 14.12.2012,on 16.01.2013 I tested at home via using those strips and got a positive result,but still I'm feeling that my periods are about to start. I feel pain in my lower abdomen and also I feel very uneasy.Is this normal.I am very happy also and scared also .pls help

Time to visit your doctor or midwife ( depends on where you live) and follow up with proper medical testing. Women have different signs and one persons normal is not anothers