Whats going on?

Michelle

So I'm on CD 66 ive had 7 negative urine tests and 1 negative blood test. The blood test was done the second week of May. Yesterday I had very very very light pink blood when I wiped and had it for a few hours then later on in the evening it was gone. Still have no sign of anymore bleeding. Period was due May 2nd. Still no period. Ive been off my birth control since January. Whats going on with me?