What pisses me off?
Women have all the choices in the world now: reliable contraception, safe and legal abortion, single mother's pensions, adoption. And all without being expected to permanently sterilise.
And what do men get? A figurative shotgun to the head to make them 'do the right thing' or the expectation to sterilise. Women have so many choices and men have none.
I think equality should work both ways.
Never regret anything that has happened in your life. It cannot be changed, forgotten or undone. So, take it as a lesson learned and move on.