I had a tubal 18 months ago, for exactly the reasons you are considering: I had my girl, and my boy, and I was having a c-sec , so why not do it while they already have me open? I haven't noticed increased PMS symptoms, and altho my periods are heavier than they were while on b/c, I cant say if they are heavier than a "normal" period, cuz my b/c caused my periods to be practically non-existant. If you are sure you really don't want more kids, have the tubal done. It will save $$ on the b/c and prevent "accidental" pregnancies from bc failure. Plus... you won't be tempted to have "just one more" when your baby gets a little bigger and you see newborns in the stores.