I'm experiencing a lot of fatigue, tension headaches, breast tenderness, nausea. I had a tubal on 9/26/12, my cycle started today but it's not heavy. I'm very sexually active. My hubby & I don't use no condoms?

Take a test . It seems like you are concerned that you might be pregnant. That seems unlikely since you had your tubes tied. If you think you might be pregnant check then check a home pregnancy test. They are cheap, reliable and available at any pharmacy.
Pregnancy symptoms. Fatigue, headaches breast tenderness and nausea can be symptoms of many conditions. A pregnancy test is always warranted. Did you have a tubal ligation to prevent pregnancy or a tubal reversal to conceive and have another child?