Hi, pregnancy 5 times after tubal ligation would be extremely rare.
this procedure is considered permanent. It is to sterilize a woman. The only time it doesn't work is if A. a clamp is used in the original procedure and it becomes loose or B. enough scar tissue forms to refuse the tubes. both are dangerous and the vast majority of pregnancies after tubal ligation are ectopic pregnancies which are not viable and dangerous.
It would indeed be a slim chance that you are pregnant but if you suspect you are, get checked out by your doctor immediately due to the dangers of pregnancy after tubal.
good luck
Yes, my mother inlaw had hers done and burned and got pregnant 5 times after.
Yes you can actual but the chances are very slim
No, the main reason people get they're tubes tied is too prevent pregnancy. I could be wrong