How likely is it that a woman can get pregnant if her tubes have been tied, she has had her menstral cycle for the month but has pregnant symptoms?

Can I be pregnant? Not likely at all. Pregnancy symptoms are usually hormones and not pregnancy. Many women fail to learn the difference. You are not pregnant.
Take a test. There is no reason to wonder about this. Simply take a pregnancy test at home. Tubal failures can occur but they are rare.