It's possible, but reversals are only about 25% successful. Talk to your doc and see what he/she has to say.
If you're wondering if you could possibly be pregnant, the success rate is about 99.5%, so the chance is always there, but it's not high.
Funny you should ask, There seems to be allot of women who get a tubal and get preggo again. Shoddy work by shoddy Dr's I guess. Get a section cut out of the tubes and have the end's burned and tied if you never want to get preggo again. Getting Steralized is different than a tubal.