Know period

Still know period and it’s been 3 days tomorrow makes 4 but I had a sharp pain below my stomach today and still having sore boobs and cramping and feeling sick so should I take a test and when I went to the MED I PEE IN THE CUP AND THEY SAID I WASNT PREGNANT BUT FRIDAY & SATURDAY & SUNDAY & MONDAY MY PERIOD DIDNT START JUST A LITTLE WHITE STUFF IN MY PANTIES AND WHEN I WIPE ITS A LITTLE CLEAR And peeing every three minutes