My tubes have been tied for 13 years I was four days late then finally came on stayed on for three days, the first day it was real light pink the second and third day their was nothing on my panty liner but if I wiped myself a light bleed would be their. Then the third day just went off like I never came on, what to you think.

Tubal ligation is not 100% effective. Could you be approaching menopause and your periods are changing?