I had a period in November but haven't started yet for decmeber I had my tubes clamped 13 months ago when my last child was born but now I'm showing pregancny signs, I ve been waking up getting sick, even at night for the last week and I eat like crazy and my breast are very tender, and darker then normal I have a little bumps around the nipple part. And my tummy is feeling harder. I'm always tied... its just so wired it's the same feeling I had with my other children. Could I be pregnant again

It's not common, but it sometimes happens. Usually any sort of a tubal is considered permanent protection from pregnancy.

Many of the signs of a period about to start can be similar to early pregnancy as well due to the hormonal changes your body makes in case a pregnancy occurs. Maybe give it a week passed when you expect your period, just in case it is late, and test if need be.