I've been sterilised, twice! I became pregnant 11weeks afterwards. I had a termination at 7 weeks 4 days, which they also messed up. Ended up on antidepressants and it took me a year to get over the whole thing. I decided to terminate as I would have had three under three and we had decided that two was all we wanted. Because the first steriilsation was not done properly, superating wound etc lots of high strength antibiotics because of wound infection, the baby could possible have been damaged.
I was sterilised again about 3 years later, I wanted to have it done under a local but the consultant said he might have to remove my fallopian tubes to make sure, but in the end I have three clips on one side and two on the other - look like a washing line on x ray! One of the original clips had come off.
Apparently the failure rate is higher in the first year after the op, something they didn't tell me at the time, they also insisted I must have been pregnant at the time of sterlisation, but a scan showed clearly that I was 7 weeks.
We were advised to sue but I couldn't bear the thought of the process, plus we wouldn't have got legal aid, so I put it down to bad luck.
I never regret either the termination or the sterilsation and it was 15 years ago now. I never dwell on the baby that might have been , the only time I remember is when discussions like this happen.
I think being sterilsed is the best option, I too didn't want DH to have a vasectomy as if anything happened to me I wanted him to be able to have a new family. I knew how much I wanted kids and didn't want to possibly deprive someone else of that.
I do get 'mittelschmertz' which is mid monthly ovulation pain, which can be common in the early years post op but not as much as I used to as I am now approaching 45!
It does make a difference to your sex life! (positively!!)