Thanks for your query.
Once you have got the tubal ligation in 2011 and never has pregnancy till now, getting pregnancy is out of question and your pregnancy tests are negative.
You can not be pregnant.
For the delayed period by 4 weeks, please consult your Gynecologist, go for ultrasonography of the abdomen to find the cause and get treated accordingly, if it is given by her.
I hope this answers your query.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.