D.Z.
I had one at the time of my c-section for baby twins #'s 4&5, I had a little discomfort on the sides of my lower abdominal area, but the weird thing is that my periods are worse. I had heard that from other women, but it doesn't make sense so I disregarded it really. (Logically speaking, I worked in GYN for 15 years, doctors never said anything). But for me it is true. I just wanted to toss that in. I only had the tubal because I knew my husband would SAY he'd have a vasectomy, but never actually DO it. Personally, I think HE should be the one to go through that, but that's my opinion!!! We do everything else!
That being said, I know everyone will support your decision because you have 6 children, but make sure you are really sure. I did go through a period of regret and mourning. I have accepted it now, but I wanted to add that in, please make sure you are ready for peace with your decision. I never cared how other's thought about our large family, most people are against it, but it is YOUR business, and only you know what a blessing a large family truly is (though chaotic at best!!).
Take care,
D.