may possibility prin Kya???

hello mga momshie... pls. advice me nmn po... KC according to my tracker na apps ... expected mens ko.. April 20.. last Saturday.. but until now.. Wala prin akong period.. SBI KC NG ob ko if madelayed ako.. try to daw mag PT... Then kninang madaling araw.. NG test ako.. but the result is negative ... concern ko is... need ko n bah bumalik sa ob ko.. or I will wait more days pa to test again... may chance Kya na mging possitive na xa sa 2nd attempt ko???? pls.... pls... help me... thanks