I had mine done 4 months after I gave birth to my last child (7 years ago).
Two things I've noticed are:
Evening before period starts, I'm really irritable (so leave me alone!!!)
and, I do bleed heavier for the first 2 days of my period, then it tapers to nothing, completely stopping after the 3rd day for a day, then on the 5th day spotting of brownish blood (the cleansing of the womb).
Cramping is only about an hour before I actually start my period and usually lasts a couple hours - tylenol helps with that.
My suggestion is, if you are done with reproduction, get fixed.