HI, thanks for using healthcare magic
There is a small risk of pregnancy
following tubal ligation
. Some studies that the chances are 1 out of 100. There is increased chances of an ectopic pregnancy.
You can consider doing a home pregnancy test, these are considered to be accurate.
The causes for delayed period are : pregnancy, perimenopause, inadequate diet, excess physical activity, emotional or physical stress, PCOS (polycystic ovarian syndrome
), abnormal levels of thyroid hormone or a hormone called prolactin
If the pregnancy test is negative , then you may want to consider visiting your doctor for an evaluation.
I hope this helps