Tubal ligation pregnant???

Alyssa & Elijah`s Mom

So I had my son March 29 and also had a tubal ligation since then I have had pretty regular periods every month we'll this month I'm late by 8 days no signs that AF is coming so do I take a test could I really be pregnant? I'm so confused as to what to do I have read the it's possible to get pregnant after having your tubes tied. By the way I'm 33. So please can y'all help me out so confused thanks