I am 19 years old female. I had protected sex with my boyfriend. My periods are 14 days late. I have felt some pain similar to my periods pain between these 14 days which made me feel like my periods are coming soon but they haven't started yet. I am done with my pregnancy test 2 times and the result was negative. What shall I do? I am very much worried. Please help me out! and tell me if I should start taking any medicine for my periods! shall I take unwanted 21 days pill? I want to get my periods.