last period was January 19th....

Celeste

I took one test about a week ago and it was negative and I was on CD 43. I am now on CD 50 and no sign of af..... I really don't know what to do. I don't want to test again because it breaks my heart seeing the negatives.... but I am irregular but I have never and i mean never gone this long with out AF showing up or being pregnant. do i test, do i go to the doctor.... im stressing out.