Had a tubial ligation 12 yrs ago an i might have endometriosis the last 2mths imy period was very irregular could i be pregnant?

Yes: If you are 33 and you had a tubal ligation 12 years ago (at age 21), then your chances for pregnancy are likely somewhere between 1:100 and 1:200. No birth control, even sterilization, is 100% effective. You could be pregnant.

Unlikely: After tubal ligation rarely one can get pregent, or may reult in a tubal pregnency, tubes can get recanulizes ( rare ). You have to see your gyn doctor, for exam , tests and treatment.