nothing to worry about, i too had problem with galstones suffering from severe pain for almost two years when the doctor advised me for the surgery, lap . Thank God i got it removed way back in 1994 and since them i am alright. yes sure, there is life even after removing gal bladder, unless God has something else planned for you.
My advise is that go ahead with the surgery. Its almost 11 years since i underwent the surgery, i am fine, Thanks to God.
Wishing you all the best