What happens after you have your tubes tied?

Hi I'm 26, and having my little boy in September. I already have me 4 year old girl. As much as I would love one more girl in the future I think 2 is plenty for me! I'm 98% sure I wanna have my tubes tied after this one bc I don't do well on any birth control not even low hormonal ones.. I have a mood disorder and it totally messes me up... I was recently told they make you take estrogen after you have the procedure done... Is that true? Also even if that isn't true does it mess with hormones at all to tie? Been told they can do it during my c section