Doubt about pregnant matters?

i had pregnancy symptoms went to test it came as negative then after fifteen days we used a pregnancy urine test kit in that they mentioned as if you get two lines after testing urine its pregnant if one line means not pregnant like that so i got two lines i dont know really iam pregnant or not but from past two days iam getting some designed sperm in urine why whats the reason. i want to know it soon please answer it as soon as possible please............................